I've run Disk Cleaner, Advanced System Care 5, Defraged. I went to PC Pitstop and they didn't find anything. I've tried rebooting (which is the only way I can get it working again after it freezes).
I was told to check and see if I needed driver updates - I checked using 3 different programs and got 3 different answers, so who knows if it's the drivers or not.
Microsoft Windows 7 Home Premium
Version 6.1.7601 Service Pack 1 Build 7601
System Manufacturer Hewlett-Packard
System Model s5713w
System Type x64-based PC
Processor AMD Athlon II X2 240 Processor, 2800 Mhz, 2 Core(s), 2 Logical Processor(s)