Upgrade from 32-bit Windows XP to Vista 64
"I bought a 64-bit computer with Windows XP 32-bit installed. Now I want to upgrade from 32-bit Windows XP to 64-bit Vista. I have tons of applications on here and I'd rather not wipe my hard drive and start over. Is it possible to do the upgrade or do I need to do a clean install of Windows Vista 64?"
Under most circumstances, this is the type of upgrade I'd never do. Too many potential headaches are likely going from Windows XP to Windows Vista in general. Switching to 64-bit compounds the possible problems. xyHD.tv has a straightforward tutorial on upgrading XP 32-but to Vista-64, with the catch that you probably want to install Vista 32 before you go all the way. Most important part of the process - backup your files before you begin. A good rule of thumb in any operating system install, but especially important when you're attempting something like this.