I have avg installed, no viruses, used malwarbytes, no malware. Used a good registry cleaner(registry cleaner) all taken cared of, I did disk clean up, all good, I even tweaked with the virtual memory and its still slow. I even tried to install super anti spyware and i cant, I get some type of error. I even tried to do system restore, but the pc wont let me open it(turned of by group). Is it just that I need more ram? Because i tried to run disk defragment, but it never finished(maybe because Im using vista, and I dont have enough ram. A little help please? Best answer for 10 points.

ive done the basic speeding up but i need more advanced ideas to speed up my computer ive done the disk cleanup disk defragment and used ccleaner and do virus checks daily i need some professional ideas.