I depend on my computer for my living, so the issue is frustrating. It only started happening on that new laptop with Windows 8 installed. My old laptop with exactly the same set of programms never had that issue. I don't have too many programms installed anyway.
HD has 500 GB, with 345 GB free space. Avast antivirus is installed. I've scanned my laptop with all sorts of programms recommended on this thread, and nothing was found: http://www.bleepingcomputer.com/forums/t/569672/slow-computer-with-100-disk-usage/page-2
I've also went through the step mentioned there and there is not much difference. The usage is not constantly on 100%, but it spikes often. I think avast antivirus may be responsible for it, but their tech support has not been helpful (they never responded, although I'm a paying customer), so I'm thinking of getting rid of it. Not sure what to use instead, though, and will also be grateful for recommendations.
Edited by aneczka, 12 April 2015 - 03:34 PM.