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