Hi There, I have a PowerPC G4 that I inherited from a cousin of mine and just recently it has started locking up at random. Either while I am listening to Itunes, Talking on Ventrillo, or even checking mail or playing a game. For example, Ill be surfing the web and listening to music. Suddenly the music stops. I move my mouse to click on Itunes but I can't click on it or anything else. The system Locks up and I don't have access to anything. Now my system specs are: Machine Name: Power Mac G4 (AGP graphics) Machine Model: PowerMac3,1 CPU Type: PowerPC G4 (2.9) Number Of CPUs: 1 CPU Speed: 500 MHz L2 Cache (per CPU): 1 MB Memory: 2 GB Bus Speed: 100 MHz Boot ROM Version: 4.2.8f1 (HardDrive) Maxtor 4G120J6: Capacity: 114.5 GB Model: Maxtor 4G120J6 Revision: GAK819K0 Serial Number: G603212E Ram: DIMM0/J21: Size: 512 MB Type: SDRAM Speed: PC100-222S Status: OK DIMM1/J22: Size: 512 MB Type: SDRAM Speed: PC100-222S Status: OK DIMM2/J23: Size: 512 MB Type: SDRAM Speed: PC133-333 Status: OK DIMM3/J24: Size: 512 MB Type: SDRAM Speed: PC133-333 Status: OK Drive: SONY CD-RW CRX170E: Capacity: 712.83 MB Model: SONY CD-RW CRX170E Revision: 2.2d Now If there is anymore information needed, just let me know. I have heard that disk drives can cause some G4's to lock up. Such as a Samsung or Pioneer I think. Anyway, if someone could help me, I would greatly appreciate it.