Inactive [InActive] karna.dat/brastk.exe

Ok, I'm sure you've heard of this problem before, but so far, reading other people's threads hasn't helped. So I don't know what else to do.

A few hours ago, my machine rebooted all of a sudden on its own. Since then, the only way I can get to any link on Google is by right clicking "cached" and hitting "open in new window. "

The only two files I could find have been karna.dat and brastk.exe.

It won't let me delete either of them, and neither appears in the task manager. I can turn off brastk.exe in the system configuration utility, but it's back on after I restart.

I am completely unable to use Spybot, AdAware, Killbox, Smitfraudfix, Malwarebytes, Hijackthis or Spyware Doctor, and I have no reason to believe I'd be able to use any others. I can't even run setup files from my desktop.

Internet access to sites dealing with security programs and anything related to Microsoft is totally closed out.

I tried the Windows Recovery Console, but nothing appears when I type.

And of course, I keep getting that annoying balloon in the sys tray about my computer being infected.

Any help would be appreciated.