You are unable to login to windows. It appears to work and then logs straight back out. This is usually because of a virus or malware that has been removed but the registry entery has not.

• Navigate to
  
  HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\
   
• In the right pane, you might see something like
  
  C:\WINDOWS\System32\wsaupdater.exe
   
• Change it so that it reads:
  
  C:\WINDOWS\System32\userinit.exe