I came home the other day and I tried to change theme to classic and my desktop hung up and I had to go to the task manager and stop personalizaion and every thing works find until I change theme again sometimes it just takes forever! Don't understand never heard of this one but also when I shutdown sometimes it hangs for a second and cause warning 1530 reg handle leaked and it is the same reg. key everytime. New pc i7 860 / radeon 5770/ 8gig ddr3/ win7 64. I did do a update from Windows the other day but it said sucessfull but warning in event viewer about media center update something like repository dont match depositories I dont have a clue where to start!PLEASE HELP DELL WONT SAYS SOFTWARE ISSUE BULLSH--!THANKA AGAIN for any ideas!