I recently installed drivers for

Hey donald

Little more detail would be great.

Step one: WHILE THE COMPUTER IS REBOOTING AND THE SCREEN IS BLANK TAP ON THE F8 BUTTON

Step two: from the available choices choose last know good configuration and then hit enter and then enter again.

THIS SHOULD WORK.

About the password;;;;;

assuming you are pressing ctrl alt del to get the advanced login screen you can try keeping the password field empty or try default passwords like 123456, password, abc123.....

I am pretty sure the blank password will work.

If it doesnot you can try going in the safe mode and uninstalling the hp software.

once the hp software is uninstalled and the computer starts working again let me know and ill help you get the hp on to the computer as well.

Please rate as fixya if this works

Cheers
Keshey

That problem you dont need to restart the system then you will only click not at this time ebuttom that appear on your screen ok now that there is now a problem now you will have to format that system because if to say it prompt for user password i would have ask you to use the administrator now the administrator you will have to reformat or try and remove the CMOS battery first and lets see if that will work for it or the administrator try and ask that person that does he or she tampper with the administrator password before if he says no then just type in administrator in the password and if it works then thats it and if idont format it ok.Rate this solution.