Hi V,ger & Justin, my sons pc is hp workstation xw600 running XP Pro with 2gb RAM & dual core intel xeon 3.4 ghz. Reaper appears to be fine once you ok prompt box but he is unsure about doing a project in it incase something funky happens later on. msvcrt.dll. is in the system32 folder & yes he is running m-audio fasttrack pro & m-audio x-sessions pro. edit: I have just uninstalled fasttrack pro ,but the problem persists. Kind Regards