Acer Aspire Back up Disc

#1
I bought my son an acer aspire 5735 running Windows Vista Home Premium. I have also got a Windows 7 upgrade. Unfortunately, I did not make a back up disc before loading Windows 7. Just wondering if I make a back up disc now, will it be as Vista (factory settings) or Windows 7 because the computer does not seem to be running simulator games as well in Windows 7 as it did in Vista. Can this be restored to Vista without too much trouble?