FBI Waarschuwing! Uw computer is vergrendeld ransomware: what it is and how to remove it

Not before you have tried everything else. Identify the family from help09.html and one encrypted file, check No More Ransom for a free decryptor, and look for clean copies in OneDrive, backups and Previous Versions.

Paying funds further attacks, may be illegal if the group is sanctioned, and is no promise of a working key: many victims get partial or broken decryption. If you consider paying for business-critical data, involve the police and a professional incident responder first, and never pay through intermediaries who promise their own decryption.

We last checked on 7 October 2026, and for FBI Waarschuwing! Uw computer is vergrendeld no free decryptor is known. We check No More Ransom, which collects free tools from police and security companies, and the decryptor pages of the major antivirus vendors.

A working decryptor exists only when the encryption has a flaw or the keys were leaked or seized. Ignore sites and videos that offer a "FBI Waarschuwing!

Uw computer is vergrendeld decryptor" for download or for a fee: these are usually scams or malware. Real decryptors are free and come from known security companies or law enforcement. Keep the encrypted files in case a tool appears later.

Some are, but read the offer carefully. Genuine data-recovery firms recover deleted originals from disks or rebuild damaged files, and they say so. Others promise to "decrypt any ransomware" for a fixed price, which is impossible without the key; they quietly pay the attackers and keep a margin, sometimes without telling the victim.

Be especially careful with services that contact you after you post about the attack online. Ask for references, a written method and a no-result-no-fee clause, and check the free tools on No More Ransom first.

We do not know yet. Nothing published so far shows data theft by FBI Waarschuwing! Uw computer is vergrendeld, but the only confirmed sign is ransom notes called help09.html in every folder, which says nothing about what happened before.

Many current ransomware attacks copy files or run a password stealer first, so it is wise to act as if they did.

From a clean device, change the passwords that were saved in the browsers on this PC, starting with e-mail and banking, sign out of all sessions and turn on two-step verification. Watch bank statements and account activity for the next few weeks.

The way FBI Waarschuwing! Uw computer is vergrendeld spreads has not been documented yet, so look at your own recent activity. On home PCs, ransomware most often comes with cracked programs, game cheats, key generators and fake updates, or with an e-mail attachment that was opened.

On business networks, attackers usually log in through Remote Desktop with a stolen or guessed password. Think back to what was downloaded or installed in the days before ransom notes called help09.html in every folder, and check the Downloads folder and Installed apps sorted by date. Keep anything suspicious for your report, but do not run it again.

Not necessarily. Ransomware names come from the file extension, the note or a word in the code, so unrelated families often end up with similar names, and one family can appear under several names. The difference matters: a decryptor or advice for one family does not fit another and can damage files.

Compare the ending added to your files and the exact name of the note with the summary table at the top of this guide, then upload the note and one encrypted file to ID Ransomware from a clean device. If the result names another family, follow the guide for that family instead.

Reading it is fine if you open it in Notepad. A plain text help09.html cannot harm the PC. Be careful with notes in HTA or HTML format: double-clicking those runs them in a window that can contain scripts, so right-click and choose Open with > Notepad instead.

The note tells you the contact addresses, the claimed amount and the deadline. Do not visit links or write to the addresses from this PC. Use the note to identify the family and check for a free decryptor first.

New ransomware is often changed just enough that antivirus programs do not recognise it in its first days. Attackers test their builds against popular scanners before release, and some switch off protection or add exclusions before encrypting. That is how a PC can end up with ransom notes called help09.html in every folder while Windows Security shows no warning.

Run a full scan and the Microsoft Defender offline scan now: definitions are updated several times a day, and the offline scan starts before Windows, where the ransomware cannot interfere. Then check Windows Security for exclusions you did not add.

You cannot open locked files normally while they stay encrypted, and renaming them will not help. Our earlier report did not record the extension that FBI Waarschuwing! Uw computer is vergrendeld adds, so check one locked file name and the ransom note for it.

No free decryptor is known for this variant; check No More Ransom (nomoreransom.org) for updates. Do not rename the files, change the extension or edit them, because that can make recovery harder. Copy the locked files to an external drive before you clean the system, so a decryptor released later still has them.

Fortect scans Windows for malware and unwanted programs and repairs the system files and settings they change, and its free scan shows what it finds on your PC before you decide anything. For FBI Waarschuwing!

Uw computer is vergrendeld, follow the plan above as well: the browser steps take back permissions and settings that no scanner treats as a threat, and uninstalling the program that brought it removes the source.

Run Microsoft Defender's full scan and, if anything was found, its offline scan as a second opinion. If the symptoms are gone after the plan and both scans are clean, there is nothing more to do.