Hi, i have a question. Iam running Win7 64bit Ultimate build 7600 and have my original win7 home permium here... Is there any chance to downgrade now my ultimate to home permium that i only type the license key in and have win7 activated? A friend told me it could be possible with an registry entrie to make this happen!? Please tell me is there any chance to get the home premium license work without reinstalling windows? I have a lot of programs running and must work every day with them i havent enaugh time to reinstall my hole pc... I hope there is a chance to downgrade my win7...!?