Antiviruses are removed! (m.b. same problem? that have BJS)

Hello, company Alwil!I have problem - on my computer the strange virus has put up. Problems, which I could allocate:

All began that power was disconnected (because of jump of a voltage in a network).After reloading, I have found out, that an antivirus Avast! Was removed. Then I have noticed, that:

---- All antiviruses, which I install on the computer, are removing. (tried AVG, Avast!, Clam AntiVirus) ----
Even Norton Protection System was removed. At installation Avast! At once leave all it’s *.exe-files. Even if simply to create a text file and to rename it in “ashAvast.exe”, it will be removed.

If start Avast! With CD, it will be blocked (it is not visible even icons of *.exe-files)
Have ceased to be started video-files. I mean, that the sound is, but there is no video-stream. For the unknown reasons, they now work again (probably because I have removed the reference on Avast from startup).
Unable enter a safe mode - computer is reloaded.

Unable to execute check of a disk - computer stops.

I am not sure, but it seems BIOS too it is impossible to open - begins to blink the screen.

I have scanned my hard disks with the help of my friend (using Avast! .4.7 Home and Kaspersky Antivirus with latest updates), and I have found some viruses:
Win32:Virtualizer [Cryp]
Win32:Agent-FED [trj]
Win32:Trojan-gen {UPX!}
Win32:Beagle-WF [Wrm]

Kaspersky:
Win32. Delf. Bn
Win32. Delf.vt
To be sure, I have removed all files with these viruses, but the virus still works! Please, help!

There is a similar topic http://forum.avast.com/index.php?topic=25822.0
Use this tool to scan your PC - http://www.f-secure.com/blacklight/ Wink

You probably still have an infection, probably a rootkit on your system that is killing avast.

See http://forum.avast.com/index.php?topic=26554.0
http://forum.avast.com/index.php?topic=25941.0

http://research.pandasoftware.com/blogs/research/archive/2006/12/14/Rootkit-cleaner.aspx
http://www.f-secure.com/blacklight/try_blacklight.html

After running the above rootkit tools if nothing is found try these.
If you haven’t already got this software (freeware), download, install, update and run it, preferably in safe mode.
AVG anti-spyware or SUPERantispyware or Spyware Terminator.

Thank you very much! I’ve scanned my computer, and manualy deleted all found files. Now all fine

It’s not the safer and wiser option.
Send files to Quarantine (Chest) for further inverstigation. Antivirus and antispyware could have mistakes and generate false positives. Deleting files won’t allow you to restore them if they’re wrongly detected as being infected.