Trojan/Virus/Worm (not sure): no taskbar, no internet, etc.

Even though Ive had my fair share of viruses and trojan in the past Ive always managed to fix them by reading forum entires and running some software. This new one has proven to be the worst. This is the first time I post a thread asking for help.

* taskbar hidden, locked (even though it is listed as unlocked) and disabled,appearing only as a thin line at the bottom of the screen.
* both user accounts affected
* safe mode or normal makes no difference. same look. same problems.
* internet access disabled, even under safe mode with networking
* B/c of above, can't run Adaware
* Unable to run media files (pics, videos, or music)
* unable to move or open any desktop icons and their associated files
* the printer has apparently been uninstalled
* Both AVG and AVAST have both been run numerous times, have found and erased viruses and trojans, but the problems persist. (one was a "html framer")


I am using a friend's computer to post this thread so any detailed info I unfortunately don't have access to.

Here is my HIJAck this log (from normal mode):

Logfile of HijackThis v1.99.1
Scan saved at 12:20:49 PM, on 10/5/2008
Platform: Windows XP SP2 (WinNT 5.01.2600)
MSIE: Internet Explorer v6.00 SP2 (6.00.2900.2180)