Revit keeps freezing on me

[JONB.102117]

I have a small to medium size file (not big enough to bog me down) as I add model groups, try to move them or mirror them my Revit freezes and gives me a "closing all windows" message. The file is linked into another file also. I have a 64 bit , 8 gig computer (powerful enough for this project)

Any ideas what this could be?

Thank you

[Steve_Stafford]

"Closing all windows" indicates a graphics card/driver issue or at least most likely culprit. Try turning Hardware Acceleration off (also the Anti-aliasing option) and see if the problem persists. If it doesn't then you'll want to sort out the driver. If it continues then you might want to start a support request with Autodesk and your reseller to help track the issue down on the technical side.