Some time ago I installed MiKTeX 2.9 with TeXnicCenter 2.0 beta (64bit) and YAP 2.9.4206. Since then I've had a problem with recompiling. That is, if YAP is already running and displaying my .dvi-file, and I click Build and View in TC, I frequently (about 50 % of times) get the following error message:
MiKTex Problem Report
Permission denied: C:\Users...\ProximinalStuff.dvi
If I close YAP before recompiling, then there is no problem. But I don't want to do that.