lsass.exe is a crucial process for user authentication and security policies on Windows 11, but it can sometimes cause high CPU usage issues.The original lsass.exe file is not a virus, and it should be located in C:\Windows\System32.Check for multiple lsass.exe processes in Task Manager and verify their file paths to detect potential malware.Common misspellings like lsass .exe, lsassa.exe, lsasss.exe, Isassa.exe might indicate malicious files.To fix lsass.exe high CPU usage, try restarting your Windows 11 computer to eliminate bugs and glitches.Performing a full antivirus scan and running a rootkit scan with Malwarebytes can help identify and remove malware.Running SFC/DISM commands to check for system file corruption is recommended to resolve high CPU usage.Keeping Windows 11 updated is advised to receive security patches and bug fixes that may address high CPU usage.If issues persist, consider performing a system restore using previously created restore points to resolve lsass.exe problems.Following these steps should help fix lsass.exe high CPU usage problems on Windows 11 and ensure system security.