I just downloaded the Cat 7.7's and was about to clean up before installing. I uninstalled all trace of my drivers Updated DC.NET Booted in SAFEMODE Went to open up DC.NET and I get this (see below) The procedure I did this time is the exact same thing I have always done and I have never ecnountered this problem. Is there something I did wrong? EDIT: I have just completley reintalled .NET 2.0 and 3.0 (had to uninstall 3.0 before 2.0) as well as reinstalling DC.NET from scratch. It appeard to have no affect and the problem persists. As well as that I am experiencing another problem, this is with the LiveUpdate feature. I get to a certain point with updating and I get this errror message: I have tried several times and still get the message. This is however a secondary issue compared to the Unhandled exeption problem. EDIT: I ran it without going into safe mode. I cleaned all the nessecary files, rebooted installed the Cat 7.7's and all is well. I'd still like to what is going on with Safe Mode?