Windows 7 - Disadvantages Windows 7 64-bit?

Does programs run slower than 32-Bit?
Does it use More Ram?

Yes it uses more RAM as compared to 32bit OS. But the programs runs even faster.

but i kinda heard that the 32-bit programs run slower in 64-bit OS

No.

so what do you recommend me to use ? 32 0r 64, according to my system specs?
i'll use whatever you tell me...

Look at my system specs. Pretty much same. I quit 32bit 3 months ago and 64 bit runs simply awesome.
Also, use this utility to see if your processor supports 64bit OS.
GRC|SecurAble: Determine Processor Security Features|

With 2 GB of RAM, there is no over-riding reason for you to go with 64 bit. There is some possibility that you will have difficulty finding the necessary 64 bit drivers. Lastly, a few 32 bit applications may not run properly or even install on a 64 bit system.

Presuming you have a 64 bit processor:

If you still use any older 16-bit apps, and most people don't, they will not run on 64 bit because there is no more built in 16 bit support. I get around it by running XP Mode, but you have to have Professional or better, and you need hardware virtualization support in your processor and motherboard to use XP Mode.

I agree with what others have said -- I install 32 bit on my computers with 2 GB or less RAM and I run 64 bit on my computers with 4 GB or more RAM (3 GB can go either way IMHO but I'd lean to 64-bit if I had a 3 GB computer).

I've been running 64 bit Professional since the end of August with no problems. I've had no problem using 64 bit Vista drivers when 64 bit Win 7 drivers are not available. Most 32 bit software runs fine, but I've gotten a few free compatibility updates for some specialized software I use.

64 bit support is quite good now and will only get better as time goes on. I recommend that everyone who has the hardware to do it, run 64 bit.

I can confirm that 64 bit does take a little more RAM comparing 2 very similar in hardware and software laptops I have, but really not that much more. It is hard to tell if there is a real speed difference though, without highly controlled benchmarks.

well i had 64 bit Windows 7 installed few days ago, and i had no trouble installing the drivers or any other software.

so if i can get better performance with no problems using the softwares that i use, then i guess i should stick to 64-bit?!

Sure, stick with it. It's anybody's guess whether or not you are better off with it, but it certainly isn't worth the trouble to go back to 32 bit.