firefox/IE/shuttingdown problem

[nvus]

my firefox and internet explorer wont open properly... they both either open very slowly or dont open at all. when it does eventually open, the browser freezes (Not Responding) when i try to browse or do anything with it

also, when i go to My Computer and try to open my C: drive, it freezes (My Computer)...double clicking my drives cause it to freeze; right click > explore doesnt

when i try to shutdown/restart my computer, it stays on "Windows is shutting down" and doesnt shut down

I have none of these problems when using safe mode.

I think the problem may be a virus. I was browsing earlier today with internet explorer and noticed a random pop up, i tried to quickly close it and it wouldnt close. So i went into task manager to try to end task my iexplorer.exe and noticed D90.tmp which is not a normal process. I ended D90.tmp and D92.tmp appeared, ended that and another D9x.tmp showed up. Eventually I was able to end task it all. I tried to open firefox after and it was so slow... thats when i tried to restart my computer and noticed the problems.

I have tried System Restore but it says something like "Unable to restore. No files have been changed."

[nvus]

Can't seem to edit my post again, but here's some more info.

I ran my virus scanner nod32 and it found nothing. Ran Spybot search and destroy and it removed some items. Ran malwarebytes BEFORE spybot and it found nothing.

Also, when i try to shutdown/restart in safe mode with networking, it stays on the "Saving your settings" and doesnt shutdown.

Only Safe Mode (without networking) shutdowns properly.

[gerbil]

If you must, use Safe Mode with Networking to dl this:
==Download this file to your DESKTOP: http://download.bleepingcomputer.com/sUBs/ComboFix.exe
.....or this file: http://subs.geekstogo.com/ComboFix.exe
Right. Now run it in NORMAL MODE!! :
-IMPORTANT! : disconnect from the web, turn off your Antivirus, Antispyware and Firewall for the duration of this scan. Don't forget to reset them before you go back on the web!
- to run it dclick the Combofix.exe icon and follow the prompts to start it. When finished, it will produce a log, C:\Combofix.txt - post that log in your next reply.
A word of caution - do not touch your mouse/keyboard until the scan has completed. The scan will temporarily disable your desktop, and if interrupted may leave your desktop disabled. If this occurs reboot to restore the desktop.