UPDATE:
I have found a bypass!!! Seems MSDTC.EXE consume 99%+ of the CPU. Found a way to end that task by rt-clicking its name on the Task List, clicking DEBUG, then stopping DEBUG.
Per Q246679 I was able to UNINSTALL MSDTC.EXE. However, I don't know the impact of this, though it looks real important.

>Reading the thread, and having time on my hands, I thought that I'd see if my machine with McAfee encountered the problem. So I booted, for the first time in a week, my Win2K SP3 machine with McAfee on it and went to UT.
>I encountered no problem "navigating" (assuming going message-to-message or forum-to-forum, etc).
>
>Looked at VirusScan and checked for updates. Found some, so installed them and re-booted. Still no problem as described in thread.
>Thought that maybe it had to do with McAfee Firewall (which I never have active) so I tried activating it. It came up with some set-up wizardy-type dialogues that I tried to answer as best I could (terminologies hardly clear to me). Also found newer software available for it, so I installed and re-booted.
>
>NOW THE PROBLEMS STARTED!@#!$@#!
>
>Boot proceeded through PWD and stuff, but stalled after showing SQL Server icon in systray (McAfee never started). Just sat there. Tried to uninstall SQL Server 7 but got message that it was active. Eventually got it stopped and did uninstall it. Re-booted, but this time after PWD stuff it just stalled again. In NEITHER boot did McAfee virus scan start, as it always had done before doing all the fiddling.
>Shortening story... SAFE MODE allowed me to tell VirusScan to NOT start automatically. Same for Firewall. First tried to UNINSTALL Firewall and McAfee but got error message that 'Installer service could not be accessed...'. Re-boot still stalls. McAfee Firewall says that I have 0 'trusted applications'.
>
>Startup process NEVER COMPLETES. It NEVER gets to the point where the network (including DSL link to internet) is 'recognized' (started) - I never see the network icon in systray whether cable is plugged in or not.
>
>Things like Control Panel 'start' but end up with blank window and 'not responding' in Task Manager list.
>
>Anyone got an idea how to get things back to some semblance of "normal"?
>
>My guess is that it is rooted in the "There are 0 program(s) that you trust to access the Internet." and I would add some to its list if I knew what to addand how to add them. I try to tell it to add IEXPLORER.EXE but after it gets into the McAfee list and I click on FULL UNFILTERED, then click OK it still shows 0 program(s).
>
>Appreciate any advice