I have the presario 5001R desk top. it has 64 mb memory, 750 Mhz Amd Duron Processor, 30 GB hard drive, and 56K Modem. what can I do to upgrade this system. I've alreadt added more memory. A friend of mine from Mississippi installed Windows XP on this system, but I had to restore the computer because the kids downloaded a virus. Can I install the vista program on here? If so how? If not , can someone tell me how to put the XP program back on here?