My main DAW is Cubase SX3 which is running on a Dual - Dual Core 285 Opteron system, Windows XP Pro, SP2. The system also includes two Lynx AES16 Cards. I wanted to have the option of a Beat Detective type function for use on tightening up the odd track. I was choosing between PT-LE W Music Prod'n toolkit and Sonar 6. I was hoping that Cubase was going to insert this functionality with the release of Cubase 4 but they didn't I ended up choosing PT because; (1) it was the DAW that I first started with (2) i still had old PT files that I wanted to access (3) PT is the most common DAW and I thought it would help with any people who brought me PT files to work on. I chose M-Powered because it was the cheapest way into PT. I chose the M-Audio Transit USB interface ($69). After installing both the interface and PT I started to get some major crashes and mulitple Blue Screens of Death. Error messages included; IRQL_NOT_LESS_OR_EQUAL PFN_LIST_CORRUPT BAD_POOL_HEADER Anyways I removed a few programs , the drivers for the transit and PT and a couple of other things. After trying variations of software installations I determined that PT 7.1.1 was crashing my system. Everything that I removed in testing is now reinstalled with exception to PT and I am running very smooth. When I install PT - boom - BLue Screen of Death. Anwyays, any suggestions/probing questions would be greatly appreciated, thanks.