Should I switch from Windows Vista 64-bit back to Windows XP 32-bit?

Depends on the system you are using. If you have a top of the line gaming system and want security then then you would have to consider what 32-bit XP and Vista will support, if your computer has more than 4GB of RAM then 32-bit will not support that, call Windows( I know sometimes this will be pointless), but sometimes they help..Ask them why they think Vista is doing this, Vista is a fairly new operating system and has a lot of glitches right now, if you havn't installed the new service pack for Vista than I suggest you do that, it coud fix the problem. If you can install vista again, go for xp unless it won't support your comp's components.