Edholl, the fact that you imply you have a problem upgrading any software, not just MTU's, strongly implies there is something wrong with your Windows installation.
I don't think you will find another post in our Forums out of the more than 20,000 that expresses this problem. Our Uninstall program for 2.315 should work for you... it does for thousands of others.
If I am wrong, and you are confident that your Windows is installed correctly and upgraded with Microsoft's many upgrades, then please post that fact back here and we'll start diagnosing your problem in a different direction.
