My Windows XP boots fine until the screen for the selection of the User account. When I select an account (doesn't matter which), the Taskbar/Desktop icons never appear.
But things seem to be working, though, as sometimes, some alerts from Panda Antivirus appear (but just advertisement. They don't reference any virus).
I can start the Windows Task Manager (via Ctrl+Alt+Delete) and I see that I have some malware processes running (e.g. 9129837.exe, xccef090131). I terminate them. I've also found that in the folder Windows/system32 there were some malware executables. I've also deleted them.
However, when I restart the computer, those malware processes/executables are created again.
I've also seen some messages saying that "msas2009.exe" and the application Utool has found some errors. These are also known malware.
Things I've tried: running Malwarebytes, but I can't install it. I go to Windows Task Bar -> File -> New Task (Run...) and try to run the setup for Malwarebytes, but nothing happens.
But, some executables I can run: I run the Command Prompt without any problems (via the same system).
I've also tried to terminate the explorer.exe process and re-running it. Still, no Taskbar appears.
Finally, I've run a full system scan with Panda Antivirus 2009... Nothing was found...
Anyone knows how I can remove this malware. Maybe by seeing the programs that are being run as Windows starts and eliminating some?
Help me, please.
NOTE: The same thing happens when I launch XP in Security Mode (by holding F8 at start-up).