Desktop (DELL XPS 420) has been running very slow. About 2 weeks ago I kept getting the blue screen of death when trying to boot up. Not sure why but it has stopped happening. However, it is even slower than before (booting up can take close to 10 minutes), opening programs take forever, and programs crash often (particularly MS Excel 2010). The only major change I have made to the computer is replacing Norton 360 with Kaspersky IS. KIS had some issues accessing the MyKaspersky website but otherwise it appeared to work. Since the problems I am having appeared about the same time I made the switch I have unistalled Kaspersky. However, the computer continues to be terribly sluggish and Excel keeps crashing. Not sure what to do. I am running Vista Ultimate SP-2, 32 bit. I may reinstall Kaspersky so the computer is protected but would like some help/advice with the sluggishness and programs crashing issues. Thanks.