My Pro Tools LE on 001 (vers 5.3.1 on Win XP Pro)works and runs OK, but lately I'm experiencing a very annoying problem: when I quit the program I get an error message like this: Microsoft Visual C++ Runtime Library Runtime Error! Program : FrogramsDigidesignPro ToolsPro Tools LE.exe R6025 -pure virtual function call and as I click OK on the message log, Pro Tools quits and I get a static intermitting signal (tic tic tic tic...) coming out of my monitors; then the system reboots, with all of the consequences we know... This only happens when I quit the program, when in use it runs OK except for a thing (see below). I tried to troubleshoot the system, but the problem happens randomly: sometimes if I just open a session and then close it, it works OK, but if I start working and do some editing or mixing then boom !! My system configuration: AMD Athlon 1800XP++ Asus A7M266 512Mb Ram Maxtor 30Gb ATA100 (boot) Maxtor 60Gb ATA100 (audio) IDE2 master Waitec CDrw IDE 2 slave Yamaha SCSI CDrw Matrox G450 Millennium Dual Head video Card ADAPTEC 2940 SCSI controller (PCI slot 5) Digi 001 slot3 IRQ 9 (or 10) Dual Boot system Win 98SE partition 1, Win XP Pro partition 2 (the problem only happens on Win XP Pro). no other cards or devices. Thanx L.G.