Re: How to upgrade my windows 7 32 bit to 64 bit?
Sorry to say, but installation DVDs only contain the files for the bitness advertised...there's no way to "switch" once you're on a bitness. So, in your case, the "Repair" and "Upgrade" installation paths are not viable. Therefore, the only way to switch to 64-bit is to make a CLEAN install, so you may want to back up your data and programs in preparation for doing so. There are articles on how to perform clean installs in the tutorials section of this site.