Adobe Acrobat 8 and Lime Wire 4.16 or so were installed on my PC running Windows XP Professional. Perhaps due to glut of software and other operating system problems both of these software started freezing one by one and numerous attempts to get them working proved futile. I had dual booting with Vista on the same computer on which both the softwares worked fine. Due to some other problems as well I formatted the hard disks containing both the windows XP and Vista. To my suprise even after formatting and and a fresh install of Windows XP twice both the softwares freeze even after up grading Acrobat to 9 Extended. The Acrobat Reader also freezes.Previously the XP was installed on the motherboard's on board SCSI chipset AIC 7902 and now it was installed on Adaptec SCSI Card 39160. Windows Vista was already on the SCSI card and previously also it was not giving any problems. What on earth is causing the problem ? Do I have to change the motherboard?