My boys have inherited an old XP PC from their Grandad. It has behaved perfectly well in his care (apart from having 5 printers worth of software loaded on its li'l Hard Disk), but - since I installed a Sitecom WL-113 wireless USB dongle, it has become prone to crashes with blue screen error warnings. This seems usually to happen when clicking to open or move between web pages that use Flash images, but is not consistent. The blue screen error message tells me DRIVER_IRQL_NOT_LESS_THAN_OR_EQUAL which according to my dodgy understanding of the various forum threads that phrase pulls into Google, seems to favour my diagnosis that 'it's the dongle drivers'. Before i go to the expense of replacing it, can anyone tell me if there is any realistic prospect of a layperson like me successfully changing the IRQL associated with the dongle, and if so, how?