I have a custom built pc. It has intel core duo2 4300 @ 1.80GHZ. 1013 megabytes of ram. My windows vista is 64bit.

I have tryed a lot of things to make it faster. Registry cleaner, disk defrag. disk cleanup even formatting my drive n reinstalling windows. I used bitdefender online scanner for viruses and it found nothing.

How can i fix my problem and possibly things that i can do to fix it are free.