Vista: high svchost disk usage, sluggishness, strange behavior (unsolved) My grandmother's Vista laptop is extremely sluggish. Internet access is slow (~60 Kbps) even though this is on a cable line, and my Linux netbook is getting good (~300 Kbps) speed on the same network. Also, svchost.exe is using an incredible amount of disk I/O, something like 500 MB in the past few minutes. I disabled indexing and prefetch and that sped the computer up a bit, but the hard drive will not stop grinding. So I'm beginning to suspect infection. So far: - Kaspersky Rescue Disk detected a couple of apparent false positives, something about finding a mailer trojan in some of the games that HP preinstalled on the computer. - Norton Antivirus (she has a subscription for it) found nothing at all, though it did give a warning about svchost's huge I/O use. - Rootkit Revealer failed to run (couldn't start the necessary service even as admin), and Gmer caused a BSOD. I'm starting to get more than a bit perplexed. There should be a reason for the sluggishness and disk usage by svchost, but nothing seems to give. Am I looking at some kind of trojan or rootkit, or am I chasing phantoms here?