Open Task Manager ( Ctrl + Shift + Esc ), find un.exe , right-click, and select End Task . Do this before deleting the file.
Always check file properties. Right-click un.exe > Properties > Details. A legitimate file has a copyright, a company name, and a version number. Malware usually leaves these fields blank or fills them with gibberish. un.exe
Navigate to the file’s location (use "Open file location" in Task Manager if you didn't close it) and delete un.exe . If you get "Access Denied," use a tool like LockHunter or Autoruns from Microsoft Sysinternals to unlock it. Open Task Manager ( Ctrl + Shift + Esc ), find un