how to fix win64/expiro malware issue on my window 11 pc

1. Run a Windows Security scan first. If the app is suspicious or malware-related, remove it only after threats are cleaned.
2. Try removing the suspicious software from Settings:
   • Start > Settings > Apps > Installed apps
   • Select the app
   • Choose Uninstall
3. If the unwanted software added itself recently, sort installed apps by install date and remove the most recent apps that were not intentionally installed.
4. Remove suspicious browser add-ons from installed browsers.
5. If normal uninstall or app repair is failing, try these Windows 11 recovery steps:
   • Restart the PC.
   • Go to Start > Settings > Apps > Installed apps
   • Select the affected app > Advanced options > Repair
   • If repair does not help, select Reset
   • If still failing, uninstall it from Installed apps
6. If malware detection or removal is unsuccessful, submit the file for analysis and use the malware troubleshooting guidance.
7. If the system has been changed in a way that cannot be repaired, back up files first and then reset the PC. Restoring from backups created before the infection is recommended because backups stored on the PC during infection may also be affected.
8. After recovery, update Windows and installed software to the latest versions.

For the BitLocker/startup side of the problem, the available guidance only supports using recovery options such as System Restore or Reset this PC when Windows no longer starts correctly after a security or malware-related issue.

• Unwanted software
• Windows 11
• Troubleshoot problems with detecting and removing malware | Microsoft Support