We just got 2009 LT a couple months back and haven't had any problems until recently. When I try to OPEN a drawing now, it takes about 10-15 minutes to get to the file window. I can go to the recently open file list and do it there no problem. I can even double click on a drawing file in Windows Explorer with no problem.
The last time this happened, I was able to do a cold boot and everything was fine. Not today.