Well, if the install does not complete, Win 7 will not normally reboot into a recovery scenario. How far exactly does it get. Are you trying to install over the 32 bit?
I would suggest, starting with a clean hard drive, or at least use the clean install option so the drive is reformatted. Once you do that , where does the install freeze. If that doesn't help, disconnect any external devices and try again. What type of video connection do you have?
If you get a chance, during a recovery operation, boot into a command window and look for a $**** folder with a setupact.log file in it. If you can read that, look close to the end and see if anything is mentioned about why the install failed. This may not be easy to do, so if you cannot, do not worry.