It takes me where you type a user name; But right after I click on it, it takes right to the same place (the user name). This happens right after i was trying to get rid of some viruses.

I clean up the registry and run anti-virus program to get rid of the virus, but now, i have this problem. Probably is a boot file that is missing, but do do i know which it is?

And then, how do i log in and install it – It wont let me log in.