I no longer think I am dealing with a an ordinary virus.
I deleted all the partitions while installing XP on Saturday Night and changed the drive size for each drive. By the time I completed the entire setup it was around 10:00 P.M. I then started to install drivers and completed that by 10:30 or 11:00 P.M. which includes installing and updating KAV 2009, CFP, Spybot 1.6.2 and Anti-Malware Bytes.
I installed KAV 2009 from CHIP DVD, the rest downloaded from filehippo. The moment I scanned with anti malware bytes it found an infection in Wextract.exe but I ignored it on finding this:
Wextract.exe - Malwarebytes Forum
Also the anti virus programs found nothing wrong with it. Immunized the system using Spybot.
I went on to install other programs all freshly downloaded apps from filehippo and chip dvd. Since the last time the problem had begun after I installed Java Run time enviroment and active X. I installed that and rebooted and checked. Later in the night after all seemed well, I started installing plugins for mozilla and started surfing using that. I also installed Opera. For both the browsers the Task Manager showed more than 200 mb ram usage when multi tab browsing was used. I thought that was bcoz of the multi tab browsing.
At 2:30 A.M. I shut it down, Last night I kept on using the system normally, at 10:30 P.M. I installed WMP 10 and Free Download Manager and installed them. I then rebooted went to msconfig and disabled wdfmgr and Btntservice and rebooted again.
I was then back to square 1. I was greeted with a log on screen. This time too I had not set a password for my account and still I would not be able to log into the system. In safe mode I can set a password and use it to log into the normal mode account. But, not otherwise. If I remove the password in normal mode log off and log in again, I am unable to log in. Again I have to repeat the safe mode steps.
So far I have not used any old software and I don't doubt filehippo.
What am I supposed to do? What I have noticed is, at both times the problem started between 10:30 P.M and 11:00 P.M. Do you think I have a virus in my bios, and if yes how can I fix that?