I've been having some weird freezing/locking issues with a work computer, so I've tried installing Spybot (and Ad-Aware as well). But Spybot doesn't work the way it always has on other computers, and Ad-Aware install appears to succeed but then the program disappears.
Spybot: I can get updates and immunize, no problem, but I'm unable to check for problems. When I click the button to do so, it gives me a message about counting and cleaning temporary files; then, regardless of what I answer, it doesn't do anything else. The "Check for Problems" button is replaced by "Stop Check", and there's a tool tip that says "Please wait, scan in progress...", but nothing else. No progress bar at the bottom, none of the stuff I'm used to seeing. I've tried it dozens of times, uninstalled, reinstalled, etc. I tried leaving it for hours with no change, but the moment I click "Stop Check," it freezes up and sometimes locks up the entire computer just like the freezing issue that I first installed Spybot in hopes of diagnosing. Behavior is the same even in Safe Mode.
Ad-Aware: Whenever I install, the installation program requires a reboot... but when the reboot is completed, all the program files have been deleted. Shortcuts have appeared on the taskbar and in the Start menu, and the program still shows up in Add and Remove Programs, but the actual files are gone.
So maybe there's a specific threat that's fighting against anti-spyware software? Can anyone give me any ideas about what's going on here? OS is XP Pro, SP 2. Thanks!