Do not let the Userinit registry entry be removed by AdAware.
You will not be able to log back on if you are running XP.
The problem and the solution are discussed here:
First Fix this entry with HijackThis:
F2 - REG:system.ini: UserInit=E:\Windows\System32\wsaupdater.exe
Then use AdAware after a reboot.
Help, my PC with Windows 10 won't shut down properly
Since upgrading to Windows 10 my computer won't shut down properly. I use the menu button shutdown and the screen goes blank, but the system does not fully shut down. The only way to get it to shut down is to hold the physical power button down till it shuts down. Any suggestions?