try these:
Open up a run dialog by holding down the Windows Key and pressing R. In the "Open" field, enter "services.msc". Look for "Windows Search" and "Superfetch."
Go to each of these entries. Right click on one and select "Properties." In the dropdown box labeled "Startup type," choose Disabled. After leaving the properties window, press "Stop" in the upper left corner. Do this for both.
From the Windows Menu, go to Settings, then go to System and then go to Notifications and Actions. Turn off "Show Me Tips About Windows". That's it. It takes maybe a minute or two to lower the disk usage and I would recommend ending any process in task manager that's making the disk usage go up in the meantime. Usage percentage should go down and stay around 1-2%.
don't know if they'll help, but still.