Had freeze issues before 7. I'd look at replacing this gear or seeing if other OSes don't lock up. My advice on the old Athlons you find in Socket A is to leave them alone. Leave them on the old OS and save your money for new gear.
This one is not an OS issue.
I have an older 2002 Compaq Presario 6410nx PC with AMD Athlon XP 1500+ and a 2004 ASROCK K7V3M Motherboard. I am using a 256 MB AGP graphics card. I have 2 GB DDR667 RAM and a new HD (250 GB) ATA-IDE. I have solved all of the hardware-software problems associated with drivers and such. However, one problem keeps reoccurring. My PC freezes all the time. When I open applications such as Mozilla Firefox, Real Player, Windows Media Player , or do serious surfing or personalizations with explorer.exe. The only thing that unfreezes the computer is if I go to Windows Task Manager and right-click on the unresponsive operation and click on create Dump File. Unfortunately, it takes my system 5-15 or 30 minutes to create the Dump File, and that does not solve the problem. It just unfreezes it at 100% of 54% of my CPU. The problem always occurs again later. Please help!