What can I do about 99% disk usage (only 0.9 MB/s)? [duplicate]

Solution 1:

I've seen a similar behavior on some computers at work. You have a pretty good chance to be infected with a trojan malware. I'll suggest to run malware and virus scans on your PC.

Solution 2:

I had the same issue. It got resolved after updating Intel® Chipset Device Software. Download this from Intel website for your chipset and install to see if it resolves the issue.

This link will help get the right drivers http://www.intel.com/content/www/us/en/support/detect.html