Help I did a fresh install over top of existing install of win 7 ultimate(64) . It resolved some of my problems created a new profile. I still have problems networking with my home network. problems seem to be geting worse. System tells me that i can't switch back to homegroup. I was trying unsuccessfully to network with xp machine now I get the error message "Your network connection must have IPv6 enabled to create or join a home network. to enable IPv6 start the homegroup troublshooter." The IPv6 on this machine appears to be enabled when I run the trouble shooter it hangs. Every time I shut off the machine Win7 update instals paches and then removes them when I turn the machin on. I guess there is a failure in configuring . my dvd/cd reader/burner stopped working shortly after completing the install. I can get the cd to eject but it does not recognize media as readable. Would reinstalling over my exiswting install solve problems or should i try installing on a fresh harddrive?