Vista - Thumbnails causing Documents Explorer to crash

When I go to Documents,before I am able to click on a file a window comes up
saying 'Windows Explorer has stopped working ' and it is searching on line
for a solution'. Then it all crashes. Another window then comes up saying
that Microsoft is aware of the fault which is caused by System Center
Operations Manager.
I have clicked on the link they give but there is nothing there of use. I
have installed the Beta version of Service Pack 1 for Vista Home Premium but
obviously there is no solution within it.
Can anyone help?
--
Larry