My girlfriend uses a Lenovo Z50 laptop. It hadn't been used for a few months and when we took it out again recently it was being extremely loud (usually right after startup, before even logging in) and the disk usage has consistently been at 100%. I've tried all the fixes listed online, including but not limited to: disabling various services, chkdsk, various different virtual memory settings, and just about every virus scan imaginable (all the ones recommended on here like rkill, tdsskiller, malwarebytes, anti-spyware, JRT, plus others like AVG etc.). Nothing has worked. Various things I've done have made it temporarily drop down and for a while the disk usage was lower but the laptop was still extremely loud, but now it's back up to 100% more or less all the time and the loudness is driving us crazy as she liked to use it for watching movies. I've run S.M.A.R.T scans and the harddrive health seems to be okay.
Any help would be greatly appreciated as I've spent hours on this and nothing has worked.