HT201210 you are running the latest version of iTunes, have no other USB devices attached, have no security software installed, and are directly connected to your ISP source, simply restarting the computer and the iOS device can clear up certain issues th

Question

you are running the latest version of iTunes, have no other USB devices attached, have no security software installed, and are directly connected to your ISP source, simply restarting the computer and the iOS device can clear up certain issues that could prevent you from restoring. After restarting the computer and iOS device, attempt to restore again.

Answer 1

How big is your library?  I would recommend the following troubleshooting steps:
- Backup your library.  Always a good idea before messing with things.  
- Create a new library.   Refer to this article for details:  http://support.apple.com/kb/HT1589.  This won't delete your old library, you're just creating a new empty one.  Also refer to this article to get back to your old library later.
- Add a few albums into this new library.  Not everything, just a small sampling, as a test.
- Activate Match on this new library.  You shouldn't have to re-pay, it should just say "Add Computer" or similar.
- At this point, Match should run again. With just a few albums it should complete in just a few minutes.
If iTunes doesn't crash at this point, then likely there's something about your original library that Match doesn't like - what that is I don't know, but at least you'll know it's not your PC.   If iTunes still crashes, then if could be a number of other things, but probably not your library.   My next suggestion (if you haven't already done this) is to uninstall / reinstall iTunes.   If that doesn't work, then my next ideas you won't like.