I'm a tech and have installed Parallels from beta to the most recent 3.0 56xx build on several Macs, including my own, without a hitch. BUT today, 2 macbooks running 10.5.3 (disk permisssion repair ok, disk verify ok, clean install of parrallels latest build 56xx ok, tried 3 different WinXP CDs (2 Pro SP2 and 1 Home SP2; one upgrade, one full) and also removed parallels cleanly (its uninstaller and sudo removes as recommended) several times then repeated the above after reboots, YET WINDOWS ALWAYS FAILS TO INSTALL AFTER THE DRIVERS LOAD IN THE PRE-INSTALLATION PHASE, I.E., THE ACTUAL INSTALLATION SEQUENCE DOESN'T CONTINUE AFTER THE VARIOUS DRIVERS LOAD WITHIN THE WINDOWS INSTALLATION THEN A STOP CODE APPEARS BUT GOES BY SO FAST BECAUSE THE VM WINDOW FLIPS BACK AND DOESN'T DISPLAY THE STOP CODE ANY MORE. Driving me crazy!!! and I'm losing money trying to get this installed! I can't charge for this failure. I also tried the above with ISO CD images and the same thing happens. I also tried a static hd image of 20Gigs instead of expandable - didn't help. I also tried with airport connection then with ethernet connection. I also tried with bridge ethernet and stardard. I BASICALLY TRIED THE PURE DEFAULT SETTINGS WITH THE DIFFERENT CDS AND ISO IMAGES, THEN TRIED WITH MANY DIFFERENT CUSTOM AND TYPICAL OPTIONS. THE SAME THING ALWAYS HAPPENS. IF THIS ISN'T RESOLVED, I'LL HALT MY PARALLELS RECOMMENDATION FOR MY OVER 350 CLIENTS COMPRISING OVER 1500 COMPUTERS. I'LL TRY FUSION INSTEAD. THIS IS MY FIRST PROBLEM WITH PARALLELS. THE MACBOOK PROS BOTH ARE ABOUT 6 MONTHS OLD WITH 10.5.3, AND NO WEIRD STARTUP ITEMS. NOTE: THEY BOTH HAD BOOT CAMP BUT I DELETED THE BOOTCAMP PARTITIONS BEFORE TRYING ANY OF THIS AND REBOOTED.