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Remove Precomp.exe (Removal Guide) - Free Instructions

removal by Jake Doevan - - | Type: Trojans

Precomp.exe – a Windows background process that might indicate malware infection

Precomp.exePrecomp.exe is a background process that might be related to Win32.CoinMiner malware infection

Precomp.exe is a process that users might find running on their Task Manager under the name of Command Line Precompressor, which can be used by many different programs, including WinRar, uTorrent, and others. The process runs in the background, and its location is usually located in the “User” folder, although it can also be found in Program Files, System32, or other folders.

However, many users have complained that Precomp.exe is running at high CPU in the background, greatly disrupting the computer work and causing lag, crashes, and errors. While, in some cases, issues may lie within corrupted program files or similar, the high resource usage is one of the main indicators for the Win32.CoinMiner malware infection. Thus virus specializes in secretly mining digital currency by using Windows CPU or/and GPU – the funds are transferred directly to cybercriminals' crypto-wallets. Without a doubt, you should not tolerate the appearance of the Precomp.exe virus, as it might seriously compromise your computer performance and personal safety.

Name Precomp.exe
Type Cryptojacking malware, Trojan
Process name Command Line Precompressor
Symptoms High CPU usage, Internet speed reduction, crashes, freezes, unresponsive apps, etc.
Related malware Win32.CoinMiner
Risks Increased electricity bills, installation of other malware, personal information disclosure, monetary loss, etc.
Elimination If the executable is not related to malware infection and is a part of 
System Recovery Malware might seriously damage several Windows processes or even corrupt some system files, especially if it has been running for a while. Upon successful elimination, we highly advise using ReimageIntego repair program in order to fix underlying issues after malware infection

Cryptominers are well-known in the cybersecurity world and have been one of the most prevalent threats during the time when Bitcoin price skyrocketed. While the popularity of cryptojackers[1] decreased, users can still infect their computers with this type of malware, and it's something that nobody would like to deal with.

Cybercriminals behind Precomp.exe Trojan might use several different distribution techniques, including:

  • fake updates
  • spam emails
  • malicious cracks/pirated installers
  • software vulnerabilities[2]
  • malicious JavaScript, etc.

As evident, there are several ways how you could get infected with coin-mining malware. Nonetheless, this precise infection is known to be spread via pirated program installers for video games or cracked software. As evident, if you downloaded such a file from a torrent or a similar site, you should remove Precomp.exe virus with a powerful security app, such as SpyHunter 5Combo Cleaner or Malwarebytes. After that, you should tune-up and fix Windows system files and settings with ReimageIntego if required.

While the impact of crypto-mining malware might not be taken seriously by some, it is important to realize that as long as a virus is installed on a computer, it is considered to be compromised. It can prevent users from performing high-resource required tasks, such as watching high-res video recordings, editing video, using graphical applications, or playing video games. In other words, Precomp.exe Miner Trojan might make the infected computer almost impossible to operate, as CPU/GPU will rack up 90% 100% of usage at any given time, and the fans will spit at their full capacity.

Precomp.exe virusPrecomp.exe is a virus that uses Windows CPU and GPU to mine Bitcoin cryptocurrency for cybercriminals

However, regular computer usage disruption is just one of the worries – the main risks include data theft as well as a computer security compromise. Malware can inject a variety of malicious files into the system, some of which might spawn tasks only later. Thus, Precomp.exe can download additional malware later and, as a result, infect the computer with other Trojans, backdoors, rootkits, ransomware, or other malicious software.

We would also like to point out that Precomp.exe can be a part of a legitimate program, even though it is causing high CPU usage. So how should you know whether you are infected? The truth is that each case is very individual, and there is no universal answer. You need to perform some checks in order to find out.

The first thing you should do is scanning your device with security software. However, keep in mind that not all security programs can detect all variants of the virus, hence Precomp.exe removal might be a bit more complicated. The solution to this is to scan your machine with a few different security programs or upload the file in question to Virus Total or similar analysis services.

Another hint is whether or not the Precomp.exe process appeared after you installed a program yourself or if it showed up seemingly out of nowhere. If you downloaded a pirated game or an app, it is highly likely that you are infected. However, if the process belongs to WinRar or another legitimate app and causes you problems, you should simply uninstall them via the Control Panel. We provide the instructions below.

Avoid being infected with malware

As previously mentioned, crypto-mining malware is just one of many security threats that are spreading around the internet. Ransomware, Remote Access Trojans (RATs), backdoors, rootkits, worms, and other types of malicious programs are designed for various tasks, and none of them are positive, at least for the end-user. Unfortunately, many malware is programmed to stay invisible on the system for as long as possible, and, if no security solutions are implemented, it can run for weeks or even months before it is spotted.

Thus, as a first security measure, you should always ensure that your computer is protected with an up-to-date anti-malware solution. Make sure your automatic updates are set in place and run regular, on-demand scans as required. Unfortunately, there is no security program that would be able to detect all malware, as it is constantly shifting – criminals find new ways to bypass security measures. Thus, experts[3] advise being cautious and conscious about online threats.

Precomp.exe high CPU usagePrecomp.exe can use a lot of GPU and CPU, causing crashes and errors

You should not open email attachments (and allowing documents to run macro function) or click on the embedded links, and avoid visiting websites that spread pirated programs/software cracks. Also, use strong passwords and never repeat them.

Use security software to get rid of Precomp.exe virus

As previously mentioned, Precomp.exe removal might not be necessary if the process related to it comes from a legitimate program. If that is the case, we advise you to employ ReimageIntego and attempt to fix issues you might be having with a Windows computer performance. If nothing helps and you are still having problems with high CPU usage, you should simply uninstall the related program, as we explain below.

To remove Precomp.exe virus, you should employ an anti-malware solution. While manual elimination is indeed possible, it is not recommended for regular computer users, as it requires deep understanding within the IT field and cybersecurity. To ensure that no such infections happen in the future, make sure you employ a real-time protection feature on your security program.

You may remove virus damage with a help of ReimageIntego. SpyHunter 5Combo Cleaner and Malwarebytes are recommended to detect potentially unwanted programs and viruses with all their files and registry entries that are related to them.

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What to do if failed?
If you failed to remove virus damage using Reimage Intego, submit a question to our support team and provide as much details as possible.
Reimage Intego has a free limited scanner. Reimage Intego offers more through scan when you purchase its full version. When free scanner detects issues, you can fix them using free manual repairs or you can decide to purchase the full version in order to fix them automatically.
Alternative Software
Different software has a different purpose. If you didn’t succeed in fixing corrupted files with Reimage, try running SpyHunter 5.
Alternative Software
Different software has a different purpose. If you didn’t succeed in fixing corrupted files with Intego, try running Combo Cleaner.

To remove Precomp.exe, follow these steps:

Uninstall Precomp.exe from Windows systems

If some application is causing you troubles, uninstall it via the Control Panel as explained below:

To remove Precomp.exe from Windows 10/8  machines, please follow these steps:

  1. Enter Control Panel into Windows search box and hit Enter or click on the search result.
  2. Under Programs, select Uninstall a program.Uninstall from Windows 1
  3. From the list, find entries related to Precomp.exe (or any other recently installed suspicious program).
  4. Right-click on the application and select Uninstall.
  5. If User Account Control shows up, click Yes.
  6. Wait till uninstallation process is complete and click OK.Uninstall from Windows 2

If you are Windows 7/XP user, proceed with the following instructions:

  1. Click on Windows Start > Control Panel located on the right pane (if you are Windows XP user, click on Add/Remove Programs).
  2. In Control Panel, select Programs > Uninstall a program.Uninstall from Windows 7/XP
  3. Pick the unwanted application by clicking on it once.
  4. At the top, click Uninstall/Change.
  5. In the confirmation prompt, pick Yes.
  6. Click OK once the removal process is finished.

Erase Precomp.exe from Internet Explorer (IE)

Remove dangerous add-ons:

  1. Open Internet Explorer, click on the Gear icon (IE menu) on the top-right corner of the browser
  2. Pick Manage Add-ons.
  3. You will see a Manage Add-ons window. Here, look for Precomp.exe and other suspicious plugins. Click on these entries and select Disable.Remove add-ons from Internet Explorer

Change your homepage if it was altered:

  1. Open IE and click on the Gear icon.
  2. Select Internet Options.
  3. In the General tab, delete the Home page address and replace it by your preferred one (for example, Google.com).
  4. Click Apply and then select OK.Reset IE homepage

Delete temporary files:

  1. Press on the Gear icon and select Internet Options.
  2. Under Browsing history, click Delete…
  3. Select relevant fields and press Delete.Clear temporary files from Internet Explorer

Reset Internet Explorer:

  1. Click on Gear icon > Internet options and select Advanced tab.
  2. Select Reset.
  3. In the new window, check Delete personal settings and select Reset again to complete Precomp.exe removal.Reset Internet Explorer

Eliminate Precomp.exe from Microsoft Edge

Delete unwanted extensions from MS Edge:

  1. Select Menu (three horizontal dots at the top-right of the browser window) and pick Extensions.
  2. From the list, pick the Precomp.exe-related extension and click on the Gear icon.
  3. Click on Uninstall at the bottom.Remove extensions from Edge

Clear cookies and other browser data:

  1. Click on the Menu (three horizontal dots at the top-right of the browser window) and select Privacy & security.
  2. Under Clear browsing data, pick Choose what to clear.
  3. Select everything (apart from passwords, although you might want to include Media licenses as well, if applicable) and click on Clear.Clear Edge browsing data

Reset MS Edge if that above steps did not work:

  1. Press on Ctrl + Shift + Esc to open Task Manager.
  2. Click on More details arrow at the bottom of the window.
  3. Select Details tab.
  4. Now scroll down and locate every entry with Microsoft Edge name in it. Right-click on each of them and select End Task to stop MS Edge from running.Reset MS Edge

If this solution failed to help you, you need to use an advanced Edge reset method. Note that you need to backup your data before proceeding.

  1. Find the following folder on your computer: C:\\Users\\%username%\\AppData\\Local\\Packages\\Microsoft.MicrosoftEdge_8wekyb3d8bbwe.
  2. Press Ctrl + A on your keyboard to select all folders.
  3. Right-click on them and pick DeleteAdvanced MS Edge reset 1
  4. Now right-click on the Start button and pick Windows PowerShell (Admin).
  5. When the new window opens, copy and paste the following command, and then press Enter:

    Get-AppXPackage -AllUsers -Name Microsoft.MicrosoftEdge | Foreach {Add-AppxPackage -DisableDevelopmentMode -Register “$($_.InstallLocation)\\AppXManifest.xml” -VerboseAdvanced MS Edge reset 2

Instructions for Chromium-based Edge

Delete extensions from MS Edge (Chromium):

  1. Open Edge and click select Settings > Extensions.
  2. Delete unwanted extensions by clicking Remove.Remove extensions from Chromium Edge

Clear cache and site data:

  1. Click on Menu and go to Settings.
  2. Select Privacy and services.
  3. Under Clear browsing data, pick Choose what to clear.
  4. Under Time range, pick All time.
  5. Select Clear now.Clear browser data from Chroum Edge

Reset Chromium-based MS Edge:

  1. Click on Menu and select Settings.
  2. On the left side, pick Reset settings.
  3. Select Restore settings to their default values.
  4. Confirm with Reset.Reset Chromium Edge

Get rid of Precomp.exe from Mozilla Firefox (FF)

Remove dangerous extensions:

  1. Open Mozilla Firefox browser and click on the Menu (three horizontal lines at the top-right of the window).
  2. Select Add-ons.
  3. In here, select plugins that are related to Precomp.exe and click Remove.Remove extensions from Firefox

Clear cookies and site data:

  1. Click Menu and pick Options.
  2. Go to Privacy & Security section.
  3. Scroll down to locate Cookies and Site Data.
  4. Click on Clear Data…
  5. Select Cookies and Site Data, as well as Cached Web Content and press Clear.Clear cookies and site data from Firefox

In case Precomp.exe did not get removed after following the instructions above, reset Mozilla Firefox:

  1. Open Mozilla Firefox browser and click the Menu.
  2. Go to Help and then choose Troubleshooting Information.Reset Firefox 1
  3. Under Give Firefox a tune up section, click on Refresh Firefox…
  4. Once the pop-up shows up, confirm the action by pressing on Refresh Firefox – this should complete Precomp.exe removal.Reset Firefox 2

Remove Precomp.exe from Google Chrome

Crypto-mining malware might inject components into Google Chrome and continue to operate via the web browser. Thus, we recommend you reset the browser to ensure its integrity:

Delete malicious extensions from Google Chrome:

  1. Open Google Chrome, click on the Menu (three vertical dots at the top-right corner) and select More tools > Extensions.
  2. In the newly opened window, you will see all the installed extensions. Uninstall all the suspicious plugins that might be related to Precomp.exe by clicking Remove.Remove extensions from Chrome

Clear cache and web data from Chrome:

  1. Click on Menu and pick Settings.
  2. Under Privacy and security, select Clear browsing data.
  3. Select Browsing history, Cookies and other site data, as well as Cached images and files.
  4. Click Clear data.Clear cache and web data from Chrome

If the above-methods did not help you, reset Google Chrome to eliminate all the Precomp.exe-components:

  1. Click on Menu and select Settings.
  2. In the Settings, scroll down and click Advanced.
  3. Scroll down and locate Reset and clean up section.
  4. Now click Restore settings to their original defaults.
  5. Confirm with Reset settings to complete Precomp.exe removal.Reset Chrome 2

Uninstall Precomp.exe from Safari

Remove unwanted extensions from Safari:

  1. Click Safari > Preferences…
  2. In the new window, pick Extensions.
  3. Select the unwanted extension related to Precomp.exe and select Uninstall.Remove extensions from Safari

Clear cookies and other website data from Safari:

  1. Click Safari > Clear History…
  2. From the drop-down menu under Clear, pick all history.
  3. Confirm with Clear History.Clear cookies and website data from Safari

Reset Safari if the above-mentioned steps did not help you:

  1. Click Safari > Preferences…
  2. Go to Advanced tab.
  3. Tick the Show Develop menu in menu bar.
  4. From the menu bar, click Develop, and then select Empty Caches.Reset Safari

Do not let government spy on you

The government has many issues in regards to tracking users' data and spying on citizens, so you should take this into consideration and learn more about shady information gathering practices. Avoid any unwanted government tracking or spying by going totally anonymous on the internet. 

You can choose a different location when you go online and access any material you want without particular content restrictions. You can easily enjoy internet connection without any risks of being hacked by using Private Internet Access VPN.

Control the information that can be accessed by government any other unwanted party and surf online without being spied on. Even if you are not involved in illegal activities or trust your selection of services, platforms, be suspicious for your own security and take precautionary measures by using the VPN service.

Backup files for the later use, in case of the malware attack

Computer users can suffer from data losses due to cyber infections or their own faulty doings. Ransomware can encrypt and hold files hostage, while unforeseen power cuts might cause a loss of important documents. If you have proper up-to-date backups, you can easily recover after such an incident and get back to work. It is also equally important to update backups on a regular basis so that the newest information remains intact – you can set this process to be performed automatically.

When you have the previous version of every important document or project you can avoid frustration and breakdowns. It comes in handy when malware strikes out of nowhere. Use Data Recovery Pro for the data restoration process.

About the author
Jake Doevan
Jake Doevan - Computer technology expert

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