My husband has a Dell XPS that was pre-loaded with Vista Home Premium. He\nhas had no problems to speak of with Vista to this point, but is on a\nbusiness trip and has run into a big problem that we're not sure how to\ntroubleshoot and fix. Once he got to the hotel and got things set up, his\ncomputer suddenly started maxing out at 100% cpu and then locks up\ncompletely, won't let him into task manager to restart, goes to black screen\nand he has to turn it off from the button. When running process explorer he\nnoted that the taskeng.exe was what was hogging the memory, but when he tries\nto stop the service or disable to service all of the options are grayed out\nin services.msc. If allowed to run and try to complete what it's doing, it\nruns for up to and over 2 hours hogging cpu the entire time. He was getting\nan error message that said "logon process has failed to create the security\noption dialog"-\-failure security options with the black screen, only when the\ntask engine continues to hog cpu and he tries to restart through task manager\nto stop it. That's when he gets the error and then the system locks up and\nhe has to restart from the button.\nFrom the info we can find about this people are saying it's a conflict with\nthird-party anti-virus/firewall software not being Vista compatible. But, we\nhave CA Internet Security Suite 2007 which is Vista ready and we have had no\nproblems with the security suite up to this point (it's been on the system\nfor about 3 months.)\nAnyone have any ideas as to what is all of a sudden causing this conflict,\nand if its something we can accurately troubleshoot to keep from happening?\nAlso, how do we disable the task scheduler engine since it won't disable in\nthe services section?\nAny help or suggestions appreciated, sorry if this is in the wrong forum area.