Originally Posted by
Wickins
Is there a particular program in Task Manager causing high disk usage? Some viruses literally screw over your hard drive so you might want to run a scan using programs like Malwarebytes or something. Try disabling unnecessary start up programs through Task Manager > Startup at the top.
Also, send your PC specs. If you have a small amount of RAM, don't expect your hard drive to be fine as low RAM results in the usage of virtual memory which essentially partitions a part of your HDD into MUCH slower processing power and that can cause serious lag.