When you logged in windows it suddenly get logged off?

If Windows logs you off immediately after logging in, it could be due to corrupted user profiles, recent software installations, or malware. Try booting into Safe Mode to troubleshoot the issue, and check for any recent changes or installations that may have caused it. Additionally, running a virus scan or restoring the system to an earlier point may help resolve the problem. If the issue persists, consider creating a new user account.