Windows 7: memory leak problems,at least i think so

ok so when i install something like a game or some programs
my memory usage is insane ,i got 2gb of ram,i had to use x64 version of windows 7 cause i play some games with gameguard
my cpu is e6750 oc'ed to 3,4ghz 8600gts graphics card
i usualy use 1gb of ram -1,3 1,5 while multitasking but when install a game i can't do anything else and it takes like 30 mins it uses all my ram if im lucky i got like 90 mb free...,same game that use to take me 5 min to install on win 7 build 7000 32bit
oh and even after i finally finish installing it takes a while for my ram to free up,IF that even happens,sometimes i have no choice but to reboot
this also happened while using opera's built in torrent feature,utorrent seams to work fine,but i still notice that after a period of time i have to restart that program cause my system becomes laggy
now i don't know what to do,i need 64bit cause i wana play games with gameguard but this problem is kinda messed up,im wondering if i'll still have it with build 7600 or should i just get it with 32 bit?
i don't know any reasons why this is happening to me,tried searching for this problem on the net and no luck
if there's any way to fix it or advice on what should i do,i very much appreciate,cause i really need some help over here
ill give any info you guys need

If you cannot upgrade your ram you really, really shouldn't be running 64 bit. Its the absolute minimum and will get eaten for breakfast if you do any gaming.

Opera's fine, Utorrent is fine, but without ram anything that runs for any period of time is going to become laggy.

If I were you I would run 64 and upgrade the ram

Ken

yah but,it's not the programs using the ram,there's absolutely no proccess indicating use of that much ram,i can play anything on this machine.. cause i oc my stuff alot i even played gta4 on medium settings never ever got under 30 frames/sec while playing it,and it never used more than 1,7gb of ram no game or program ever used above that,but while installing the damn thing you wouldn't believe how slow my pc was,couldn't even move the freeking cursor right,i know i would need more ram normaly but it's not this problem i am having
edit: even if i had 6gb of ram same thing would happen,you know if i multitask and use all my ram as i am doing now to test it,my pc is not running that slow not even near that,something happens whit my cpu too i think

OK so what problem are you having?

Ken

that's just it i don't know,this never even happened to me on vista x64(i had it just to see how it is)
im thinking on trying to install the newer build on 64bit see if i still got that problem,if so ill go 32bit till i get more ram,

Certainly newer build will not use more ram, and there are less bugs and more drivers in it.

Ken

or better yet i'm dual boot x64 and x86 then i'll be able to observe performance and decide on what to keep :P cause other than this win 7 is just better for me,i like it more than linux than xp or anything

Just out of curiosity, what is the difference between x64 and x86?

Zen

64bit has double the memory path, is faster, and is the future. The down side to 64bit is more difficulty in drivers, more heat, and some apps are not yet written in 64 bit (like adobe). If I was a graphic artist I would want 64bit, as a fairly demanding home use I would enjoy its benifits, but alas my computer will not run it

Ken

That works for me then, thanks. Was x86 the old 32-bit thing?