My W7x86 has near 3 years, I see it's time to make format
I make a backup after installing everything. If I want to install a new software permanently, I restore the last backup, install it and make a new backup.
This way I always have a fresh and fast system without garbage.
BTW2: is sense to install x64 system? I have Core 2 Duo 2.13 and 3GB
RAM.
It does work without any problems with 3GiB, but I don't think that it's neccessary if everything is ok for you with x86.