You need to fix the root problem with whatever "tvdmcpu" is.
Unfortunately, a Google search for "tvdmcpu" brought up nothing. Narrow
down the troubleshooting by answering:

The First Question Of Troubleshooting: what changed between the time
things worked and the time they didn't?

The Second Question of Windows Troubleshooting: what is the
malware/virus status of the machine? If you think it is clean, what
programs (and versions) did you use to determine this?

Be sure the computer is clean:
http://www.elephantboycomputers.com/page2.html#Removing_Malware

Malke

http://inetexplorer.mvps.org/data/memorymeter.htm
Found this for tvmd.exe that may be related to your problem, see above
link..

http://www.google.com/search?hl=en&q=+tvdm.exe&btnG=Search
http://www.bleepingcomputer.com/startups/wscntfy.exe-13012.html
http://www.google.com/search?q=16+bit+ms-dos+subsystem
http://www.google.com/search?hl=en&q=+tvdm+cpu+&btnG=Search
Search the above links and come to your own conclusion, your call..

http://www.majorgeeks.com/download506.html  (Ad-Aware SE ) should id
tvmd.exe ..
http://www.spybot.info/en/download/index.html (Spybot Search & Destroy)
http://www.javacoolsoftware.com/ (SpywareBlaster)
These really work and are a must have, in my opinion anyway, for what it's
worth I use them all..

Suggest might you also run HighjackThis ver 1.99..
http://www.merijn.org/downloads.html (download it here)
http://hjt.iamnotageek.com/  (submit your report, if needed)
http://hometown.aol.co.uk/jrmc137/hjttutorial/tutorial.htm

Also recommend you can do an online scan here..
http://www.bitdefender.com/scan8/ie.html

Be sure the computer is clean as Malke has indicated..
Just trying to help..
Cheers
j;-j