I had the same problem. Ended up reinstalling windows, I'm afraid. When I did, I discovered that everything worked great as long as I only used the administrator account that I installed Windows with. As soon as I started using a separate standard account, I started having problems. TV that I watched with the regular account would flicker and then I discovered that I couldn't repair, uninstall or reinstall DVRMSToolbox. So, for now, the only solution I've come up with is to reinstall windows and only use the administrator account that you create during installation.