Unfortunately a clean install of 64 bit will be required. See here for detailshttp://windows.microsoft.com/en-US/windows...asked-questions
Just found out that the technician that installed Windows7 installed the 32 bit version instead of 64 bit. Lightroom and the Photoshop Suite are now running on 32 bit since they were installed on a 32 bit system. Is there an easy way to change them to 64 bit or do I have to do a reinstall? By the way, it is a 64 bit capable computer...I ran everything 64 bit under Vista. The reason for the reinstall was due to a hard drive problem (4 lost drives in a year and a half using RAID 1) we had to wipe the drives to get rid of RAID so it was a good time to upgrade to Windows7. I probably wouldn't have messed with the upgrade otherwise.