Vista - DHCP Failure

My roomates computer has an issue that I have not been able to solve all week. here's the gist of it. The computer connects wireless, and is able to get an IP from router. I can ping the router, and other computers on the network. All other comupters on network are able to access the internet.

One thing that is happening is the DHCP Service keeps stopping on me. I've perused the posts on here looking for answer's. Here's a list of all I've done.

Disabled then enabled wireless adapter
uninstall/reinstall wireless adapter
manually set IP address
repaired winsock/winsock2 entries using LSPFix.exe and "netsh winsock reset" command (elevated to admin)
ran virus scan (AVG 8.0.169) with no hits
ran AD-aware SE (1 hit, removed, did not solve issue)
ran RegCure with 999 hits, cleaned, did not solve problem
Try'd to do a "system restore"..but the computer couldn't do it (hard drive has 6% free space)

I'd give a screenshot of the error, but its on another comp. Here's what it says:

"Host Process for Windows Services stopped working and was closed. A problem caused the application to stop working correctly. Windows will notify you if a solution is available."

Any help is appreciated.

There is some process that is interfering. He is either running a program that the others are not running or it is one of his startup programs that does it. I would have a close look at all of those.

BTW: this 6% free space problem needs to be fixed. There is no way he can live with that. I suggest to get an external disk or a very large USB stick and move some of the user files outboard.

The hard drive has been cleaned up...all movies downloaded to an external. sys restore still doesn't work, and nothing else I've done helps at this point either. I'll run msconfig and go through the startup to see if any program is causing the issue.

Hi
I have the feeling that the computer is due to refresh via reformatting and
installing Vista again.
Jack (MS, MVP-Networking).

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