Fast forward to May 2009, I experimented with Windows7 build 7100 64bit and Solid Edge V20 32bit. As mentioned in previous posts, the installer hangs and never finishes it's job. If you bring up the process manager (Ctrl+Alt+delete) and kill anything to do with "printing", such as "printer installer", the process will finalize and you will have a valid installation. You may want to reboot and restart Solid Edge to verify a valid install. My understanding is the V20 64 bit installs well with the same trick, but refuses to run after reboot. I wonder what was UGS response to NardoAPC. By the way I think it is not Windows7 causing this problem, my NEi-Nastran V9.2 X86 refuses to install searching for XP sp1, or Vista. Apparently installer programs are the root of these problems.