So here's my issue, I am on a work system that is as follows: Windows XP Pro Version 2002 Service Pack 3 Intel Core 2 Quad CPU @2.66 GHz, 2.75 GB RAM I have to uninstall .NET 4 using Add and Remove Program Files so that I can re-install it. After starting up, clicking Add and Remove Program files either in Explorer or the control panel brings up the interface but the program files never populate. It doesn't state that it is populating or give any kind of error. Once I close that window I cannot get it to come back without restarting and it still won't populate. I've tried Start/Run regsvr32 appwiz.cpl but other than the hourglass flashing a few times next to the cursor, it has no effect. I do not have access to the XP install disk so I'm a bit limited on my troubleshooting. Any assistance is greatly appreciated.