I am joining a development team for a huge .net application right now. This application using a lot of com+ object thus i need to set up my environment at the begining when i want to start my development on one of the module. But the funny thing is, once i set up my development environment properly (copy all assembly using gacutil, and then using regsvcs for com+ object), i cant shutdown/reboot my pc. Once i shutdown/reboot my pc, when i run my application, it will shows me object reference not found and i need to re-setup all my environment again. <BR><BR>Could any one tell me what is the cause for this problem and how to solve it? thanks. :)