First, if it bug splats, send the error report, and ideally open a support ticket including a file with the problem so they can take a look. This is the way that bugs (eventually) get fixed, though obviously that's not going to help you in the short term.
I have no idea what the actual problem is, but here are some vague things that may help you:
Reboot your PC. It works more often than it should.
Play around with your SketchUp preferences, there might be something in there causing a problem.
Download and run CCleaner, it will wipe your caches, that might help if you're lucky.
Reinstall SketchUp.
Check your hardware, there are various utilities online for different components. It's unlikely, but faulty hardware is a possible cause.