My computer keeps logging off after entering the password help

Turn off the laptop
After turning it on begin tapping the F8 key

Tell me what happens .. if you get the options select
Disable automatic restart after system failure

Hi,
Boot your computer in safe mode,right click My Computer>properties>Advanced>uncheck"Automatic restart" under System Failure.
Scan your whole computer in safe mode then restart normally.

1. You need to connect the infected computer to a network. Make sure that there is one computer in the network which doesn’t suffer from this problem. Now, switch on both of the computers, i.e. the infected and the working computer.
2. From the working computer, Go to Start> Run, type regedit.exe and hit enter. This will launch the registry editor.
3. Go to File> Connect Network Registry, by using this infected computer’s name or IP address.
4. Locate the following entry:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\
5. In this entry there is a key named userinit, double click on the key and set its value to “C:\WINDOWS\System32\userinit.exe,”
If the problem still persists then you need to run a repair setup. Check out for detailed instructions on running a repair setup over here.