Oinstall.exe (Removal Instructions) - Virus Removal Guide

oinstall.exe Removal Guide

What is oinstall.exe?

oinstall.exe is the file that can be found as malicious by AV tools

oinstall.exeoinstall.exe is the possible malware that triggers issues with performance.

oinstall.exe – the executable that raises questions about its legitimacy and secureness when programs designed to find malware indicate the file as possibly dangerous. It sometimes is detected as Trojan.Gen.2 or Trojan.Smoaler, PUA:Win32/AutoKMS, HackTool:Win32/AutoKMS by Defender, and other anti-malware or security tools.

oinstall.exe generally is related to the process known as Office 2013-2016 or OInstall, so it belongs to software OInstall by WZTeam or WZT. You should investigate further and check the particular location of the executable before you jump to removing the file entirely from the machine.

Name oinstall.exe
Type Trojan
Issues The three can be used to mine cryptocurrency while running on the particular resources of the computer. Your data might get stolen by this virus or additional malware installed with the help of oinstall.exe virus
Distribution A trojan like this can end up installed from a spam email attachment or directly from malicious/ hacked sites
Elimination You can remove oinstall.exe by running a proper anti-malware tool that finds and removes the intruder completely
Repair System damage might trigger other issues for you, so using FortectIntego or a similar tool could help with the virus damage repair

There are possibilities that the purpose of this trojan is to install other malware, spread ransomware,[1] or more damaging threats. Also, such malware can be set to mine cryptocurrency, use resources to run other processes, steal data directly from the machine. oinstall.exe removal processes get more difficult due to the fact that this intruder is using the name of a common executable.

However, Oinstall.exe is not essential for Windows and will often cause problems. So you can remove it if it bothers you – it shouldn't cause serious damage to the system, except the program it launches or is related to. The file is located in the C:\Windows folder or sometimes in a subfolder of the users' profile folder.

The program has a visible window that is launched with the install exe file. It is not a Windows core file. The app is launched periodically by the Windows Task Scheduler, and it appears to be a compressed file. It should be a secure file, but trojan developers use the commonly found file name and type to mask their shady purposes. If the file is malicious and triggers serious issues, you need to remove oinstall.exe as soon as possible.

oinstall.exe virusoinstall.exe - trojan is the possible malware vector, remove the threat ASAP.

oinstall.exe trojan can trigger various issues on the machine. One of the malicious procedures related to this threat – cryptocurrency mining.[2] You should be concerned about the existence of this file and the processes that are possibly related to the intruder. Check the system with SpyHunter 5Combo Cleaner or Malwarebytes, so you can terminate the virus.

In general, you should be cautious and make sure to check some details about oinstall.exe. The more indicative things besides the AV detection can be shady symptoms of the computer issues:

  • Extremely high or just unusual CPU or graphics cards usage;
  • Windows and also programs run slower;
  • Programs do not launch as smoothly;
  • General sluggishness and seed, internet issues;
  • Occasional crashes of the OS.

Experts[3] recommend fighting such intruders as soon as possible, because in many cases, trojans, like oinstall.exe can go away or stop working once the initial goal is achieved. If the system is infected with additional malware, your device might get damaged, so repair such alterations and corruptions with FortectIntego or a similar program.

Infectious files delivered via spam email attachments and malicious links

You can't be sure that sites you end up visiting randomly are not malicious or dangerous in a different way. Hackers use various techniques to spread their creations, so you might caths the computer infection without realizing it. It happens when you do not pay enough attention to details when installing programs or opening emails.

Spam email campaigns get used to automatically attach malicious files to those emails that claim about important messages and invoice notifications. You need to pay close attention and be suspicious when the email includes a link to a particular site or the attachment as a document or a different file.

Make sure to clean the system from all the traces of this suspicious oinstall.exe virus

You might have a difficult time while trying to remove oinstall.exe because threats cannot get easily found or even detected by your AV once additional changes get made. You can enter the Safe mode with Networking and then run SpyHunter 5Combo Cleaner or Malwarebytes, so the threat is terminated.

As for those changes and corruption of files, programs that affect the general performance of your machine, and the results of oinstall.exe removal, you can fix the damage. System files, functions, to her parts of the machine gat get repaired with a program like FortectIntego, for example.

do it now!
Fortect Happiness
Intego Happiness
Compatible with Microsoft Windows Compatible with macOS
What to do if failed?
If you failed to fix virus damage using Fortect Intego, submit a question to our support team and provide as much details as possible.
Fortect Intego has a free limited scanner. Fortect 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 Fortect, 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.

Getting rid of oinstall.exe. Follow these steps

Manual removal using Safe Mode

Run the machine in Safe Mode and remove oinstall.exe trojan this way

Important! →
Manual removal guide might be too complicated for regular computer users. It requires advanced IT knowledge to be performed correctly (if vital system files are removed or damaged, it might result in full Windows compromise), and it also might take hours to complete. Therefore, we highly advise using the automatic method provided above instead.

Step 1. Access Safe Mode with Networking

Manual malware removal should be best performed in the Safe Mode environment. 

Windows 7 / Vista / XP
  1. Click Start > Shutdown > Restart > OK.
  2. When your computer becomes active, start pressing F8 button (if that does not work, try F2, F12, Del, etc. – it all depends on your motherboard model) multiple times until you see the Advanced Boot Options window.
  3. Select Safe Mode with Networking from the list. Windows 7/XP
Windows 10 / Windows 8
  1. Right-click on Start button and select Settings.
  2. Scroll down to pick Update & Security.
    Update and security
  3. On the left side of the window, pick Recovery.
  4. Now scroll down to find Advanced Startup section.
  5. Click Restart now.
  6. Select Troubleshoot. Choose an option
  7. Go to Advanced options. Advanced options
  8. Select Startup Settings. Startup settings
  9. Press Restart.
  10. Now press 5 or click 5) Enable Safe Mode with Networking. Enable safe mode

Step 2. Shut down suspicious processes

Windows Task Manager is a useful tool that shows all the processes running in the background. If malware is running a process, you need to shut it down:

  1. Press Ctrl + Shift + Esc on your keyboard to open Windows Task Manager.
  2. Click on More details.
    Open task manager
  3. Scroll down to Background processes section, and look for anything suspicious.
  4. Right-click and select Open file location.
    Open file location
  5. Go back to the process, right-click and pick End Task.
    End task
  6. Delete the contents of the malicious folder.

Step 3. Check program Startup

  1. Press Ctrl + Shift + Esc on your keyboard to open Windows Task Manager.
  2. Go to Startup tab.
  3. Right-click on the suspicious program and pick Disable.

Step 4. Delete virus files

Malware-related files can be found in various places within your computer. Here are instructions that could help you find them:

  1. Type in Disk Cleanup in Windows search and press Enter.
    Disk cleanup
  2. Select the drive you want to clean (C: is your main drive by default and is likely to be the one that has malicious files in).
  3. Scroll through the Files to delete list and select the following:

    Temporary Internet Files
    Recycle Bin
    Temporary files

  4. Pick Clean up system files.
    Delete temp files
  5. You can also look for other malicious files hidden in the following folders (type these entries in Windows Search and press Enter):


After you are finished, reboot the PC in normal mode.

Remove oinstall.exe using System Restore

System Restore can possibly work as a method terminating the malware because this feature recovers the PC in a previous state

  • Step 1: Reboot your computer to Safe Mode with Command Prompt
    Windows 7 / Vista / XP
    1. Click Start Shutdown Restart OK.
    2. When your computer becomes active, start pressing F8 multiple times until you see the Advanced Boot Options window.
    3. Select Command Prompt from the list Select 'Safe Mode with Command Prompt'

    Windows 10 / Windows 8
    1. Press the Power button at the Windows login screen. Now press and hold Shift, which is on your keyboard, and click Restart..
    2. Now select Troubleshoot Advanced options Startup Settings and finally press Restart.
    3. Once your computer becomes active, select Enable Safe Mode with Command Prompt in Startup Settings window. Select 'Enable Safe Mode with Command Prompt'
  • Step 2: Restore your system files and settings
    1. Once the Command Prompt window shows up, enter cd restore and click Enter. Enter 'cd restore' without quotes and press 'Enter'
    2. Now type rstrui.exe and press Enter again.. Enter 'rstrui.exe' without quotes and press 'Enter'
    3. When a new window shows up, click Next and select your restore point that is prior the infiltration of oinstall.exe. After doing that, click Next. When 'System Restore' window shows up, select 'Next' Select your restore point and click 'Next'
    4. Now click Yes to start system restore. Click 'Yes' and start system restore
    Once you restore your system to a previous date, download and scan your computer with FortectIntego and make sure that oinstall.exe removal is performed successfully.

Finally, you should always think about the protection of crypto-ransomwares. In order to protect your computer from oinstall.exe and other ransomwares, use a reputable anti-spyware, such as FortectIntego, SpyHunter 5Combo Cleaner or Malwarebytes

How to prevent from getting malware

Protect your privacy – employ a VPN

There are several ways how to make your online time more private – you can access an incognito tab. However, there is no secret that even in this mode, you are tracked for advertising purposes. There is a way to add an extra layer of protection and create a completely anonymous web browsing practice with the help of Private Internet Access VPN. This software reroutes traffic through different servers, thus leaving your IP address and geolocation in disguise. Besides, it is based on a strict no-log policy, meaning that no data will be recorded, leaked, and available for both first and third parties. The combination of a secure web browser and Private Internet Access VPN will let you browse the Internet without a feeling of being spied or targeted by criminals. 

No backups? No problem. Use a data recovery tool

If you wonder how data loss can occur, you should not look any further for answers – human errors, malware attacks, hardware failures, power cuts, natural disasters, or even simple negligence. In some cases, lost files are extremely important, and many straight out panic when such an unfortunate course of events happen. Due to this, you should always ensure that you prepare proper data backups on a regular basis.

If you were caught by surprise and did not have any backups to restore your files from, not everything is lost. Data Recovery Pro is one of the leading file recovery solutions you can find on the market – it is likely to restore even lost emails or data located on an external device.

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Ugnius Kiguolis
Ugnius Kiguolis - The mastermind

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