Have you check the Task Manager to find out which process causing the high disk usage?
You could uninstall all third party antivirus program to see if that will resolve the problem.
Please download and install Speccy to provide us with information about your computer. Clicking on this link will automatically initiate the download.
To keep a record of your system profile at any given time, you can publish to the Web using Speccy. Speccy uses Piriform's servers to publish the profile without any identifying information. Each profile is given a unique URL. For an example, see:
The last part of each URL is randomized, so only people you provide with the URL will be able to find your profile.
Note: Each time you start Speccy, it will generate a new randomized URL. This is useful if you want to track your computer's information over time.
To publish a Speccy profile to the Web:
- In Speccy, click File, and then click Publish Snapshot.
- In the Publish Snapshot dialog box, click Yes to enable Speccy to proceed.
- Speccy publishes the profile and displays a second Publish Snapshot. You can open the URL in your default browser, copy it to the clipboard, or close the dialog box.
- In your next post right click inside the Reply to Topic box, then click on Paste. This will load a link to the Speccy log.