So i was thinking about getting WIndows 7

It was like that out of the box - not so for XP which was a pain in the arse to get it working.

Pain in the ass? It's a matter of checking a checkbox.

Windows 7 is also safer. It's virus protection and so forth out performs XP. It's cleaner looking. The only downside is it uses a lot more RAM than XP and takes more space. If you have a GB of RAM, running 7 will push your system. I think Wind7 is 20 GB? Not sure what XP is.

Lets begin with the fact that neither of the OS's you mentioned come with bundled virus protection (unless you call defender\security center a "virus protection"). Perhaps you are talking about OS exploits, but these can easily be fixed by updating your XP or installing a third party security software. Additionally, the main reason Windows 7 has less exploits is because the majority of users still use XP, and because Windows 7 is relatively new.

64 bit OS are for computers with more than 4GB memory, because for 32 bit OS, doesn't matter how much memory your computer have, the OS can only use 4GB. Since most computers nowadays still have less than 4GB memory, 64 bit is useless.

I'm starting to get the feeling I'm the only person in the world that remembers the REAL reason 64bit is superior (not all this RAM pomegranate) - because it can compute int64\QWORD\long (pick your favorite name to 64bit long integers) without using FPU\MMX\SSE.