Problem: When using Smartripper or DVD Decrypter my PC locks up completely the only way to restart is to hit reset or power cycle. It then will not boot, C: drive is not accessable i.e. invalid drive specification. and Emergency Recovery Disk or Recovery Console fixmbr etc all fail to recover system. Sometimes can rip one or two DVD ok but eventually it will lock up. Before this error occured I ripped over 60 DVDs and burnt using CloneDVD2 onto Samsung 1x media without problem. The problem first occured when I was using two sessions of DVD Decrypter to rip two DVD simultaneously, it worked fine for 6 DVD then crashed as above. After rebuilding the system I have not installed DVD Decrypter but SmartRipper causes same crash now. I now have a Ghost image of system plus all apps except DVD software so I can experiment and easy restore. System: AMD XP2400+, 512MB RAM, 200GB WD HDD, NEC ND-2500A 1.07, LiteON DVDROM, NVIDIA GeForce4 64MB, Win2000 SP4 with all updates/patches, ASPI Layer 471a2, Trend PC security 2004 latest ref scanned clean, Spybot & Adaware latest both scan clean. CWShredder Clean. All background progs disabled during ripping/burning. So Far: I have tried updating ND-2500A to 1.07, Resetting PC BIOS to defaults, disconnecting Liteon DVDROM & using NEC and vice versa crashes with either drive, tested RAM all OK. Can burn data Backups to DVD OK Can capture from DV camera convert and burn to DVD OK HELP Please. If anyone can suggest something I have not thought of or a different ripper to try I would greatly appreciate it.