Hi, I'm running windows XP service pack 2, professional. AMD Athlon 64 x2 dual core 4400+, 2.31 GHz, 2.00 GB ram sata seagate barracuda 1tb, 2 equal partitions thermaltake xaser 3, 480w nvidia geforce 9600 gt oc About 2 weeks ago my computer started freezing on video playback; streaming and games both. It quickly started to freeze randomly even when idle. Sometimes it will take 30 minutes, sometimes it will go for an entire day of idle and then freeze. Problems besides the freezing: 1. Transferring files between partitions on my hard drive, or to a flash drive, will work normally, but as time goes on the slower it gets. 2. Attempting to view a large folders properties, 11gig, took around 20 seconds as the properties screen actually counted up from 0 how much space the folder was taking and counted how many files were in it. 3. My services.exe eats a ton of memory when windows loads, 50+ of my cpu, spiking up and down, and then when done it sits around 30k to 50k, occasionally taking 2 to 4% of my cpu randomly. 4. For a little while, whenever I watched a video, my page filing would climb climb climb, and then I would crash, but it doesn't do that anymore. 5. CPU will spike randomly 50-80% while the pc is idle. What I've done: 1. I've run memtest86, no errors. 2. Chckdisk - no errors. 3. defragged the partition with windows on it, no errors, and amazingly didn't freeze until after it was done, took it about 9-12 hours. 4. malawarebytes - no viruses. 5. adawareantivirus - no viruses. 6. svchostanalyzer - nothing out of the ordinary. 7. taskmanager17 - nothing out of the ordinary. 8. booted noppix from a flash drive, had no idea what to do after that but it didn't crash. Whenever the computer crashes it's explorer freezing/crashing. Doesn't matter if I'm attached to the net or not, still crashes, video playback greatly speeds up how soon it crashes. I'm not sure what to do next. I don't really want to format my windows partition and reinstall, and I don't have any spare parts laying around to do hardware swap tests. My video card did get really hot about 6 months or so ago, but I cleaned the dust out and have kept the entire pc relatively dust free since and haven't had any issues until now. Are there anymore software tests I can run before starting on the hardware? Are there anymore hardware test I can run to try and narrow down the problem? Does anyone know what might be the problem from past experiences? The problem doesn't appear to be getting worse, it's just unusable for now. Any help is much appreciated, thanks.