Explorer.exe Running at 100%

This has just started (2 days ago), where if I click on My Computer\ C\any
folder explorer.exe runs and consumes 95% of the cpu. Additionally, the
sub-folder (and folder contents) that I click on will never load. The
address bar at the top turns green like it is trying to load the contents
but nothing ever happens after letting it run for 3 hrs.

I have a plain vanilla machine with a 2.2 ghrz processor and 4 gigs of
memory. If the cpu keeps running at this speed and temp, it will finally
blow.

There is nothing on the MS website related to this and a bunch of nothing on
the web. Does any MVP or someone from MS have an idea?

I have submitted a ticket with MS but no response yet.

When things run good, then run great, when things run slow it .........

Any ideas would be appreciated,

P.S. I have run cleaner, defrag, chkdsk ..........................