Need help with removing virus

[virus_killer1]

Basically, the virus took control of the whole system. I cannot access the Registry Editor nor via the Start>Run>regedit, the Run option disappeared along with my hard-drive folder. The pc has a firewall, anti-virus, and anti-spyware that the virus took control of. It also keeps trying to connect online which I removed the internet cable. Whenever, I perform a scan that scan does not go all the way through, the computer automatically reboots.
It seems to me that the virus learned the programs and has some kind of backdoor? I need help figuring how to solve this problem.

I have a Windows XP, Pentium D, 2 GB of RAM, and over 50 GB of hard-drive space.

I really appreciate your help.

 

[Cookiegal]

Hi and welcome to TSG,

Click here to download HJTsetup.exe.

• Save HJTsetup.exe to your desktop.
• Double click on the HJTsetup.exe icon on your desktop.
• By default it will install to C:\Program Files\Hijack This.
• Continue to click Next in the setup dialogue boxes until you get to the Select Addition Tasks dialogue.
• Put a check by Create a desktop icon then click Next again.
• Continue to follow the rest of the prompts from there.
• At the final dialogue box click Finish and it will launch Hijack This.
• Click on the Do a system scan and save a log file button. It will scan and then ask you to save the log.
• Click Save to save the log file and then the log will open in notepad.
• Click on "Edit > Select All" then click on "Edit > Copy" to copy the entire contents of the log.
• Come back here to this thread and Paste the log in your next reply.
• DO NOT have Hijack This fix anything yet. Most of what it finds will be harmless or even required.

Note: During this process, it would help a great deal and be very much appreciated if you would refrain from installing any new software or hardware on this machine, unless absolutely necessary, until the clean up process is finished as it makes our job more tedious, with additional new files that may have to be researched, which is very time consuming.

Also, please do not run any security programs or fixes on your own as doing so may compromise what we will be doing. It is important that you wait for instructions.