Automatically logs me off

Try accessing "Safe Mode". Upon start up of your notebook, continually keep tapping on the F8 key. If all goes well you will be at the "Advanced options" window. Select "safe mode" press OK, select your OS and press OK. This will take you to a DOS screen with lots of text. Wait for a few minutes at this window. At the next screen try your login and see if it will let you in. If you are now accessing your notebook in Safe Mode, see if you can check you can check the event logs (right click My Computer, choose Manage. The Computer Management window will open. In the left side, click on the plus symbol beside Event Viewer. Now highlight the Systems file and check any error messages that may be there.

Hope this helps.

It affected by virus