You should post some better internal info > Like Speccy, which offers specs, temperature, SMART, etc... more than a simple task manager screenshot.
Alternatively, there are basic things you can do to diagnose/fix a slow computer. Here's a list of tutorials, programs, etc... you should checkout.
~ Remove known junk using Revo
* Remove/disable unnecessary and reoccurring tasks.
* Remove/disable unwanted services. Do not mess with anything you're uncertain about. Only the obvious ones that are related to adware, crapware, or utilities you've knowingly removed in the past but may still be lingering.
~ You can't use
msconfig with Win 8 so instead go to the "Startup" tab available now in the task manager. Disable excessive/unwanted startup progs from there.
Did you manually run
chkdsk? Whether manually or automatically, it's happening for a reason. HDD failure can absolutely cause "crashes" and a dramatic decrease in performance so I suggest running a (bootable) HDD diagnostic tool like the following:
HDDRegen, HDAT2, MHDD, SpinRite, Hiren's BootCD, etc.. which may or may not fix the "slow" issue entirely, that depends on the severity though. Regardless, running one of them will offer more info.
Otherwise, if you don't want to make a simple bootable diagnostic tool you can post the results of CrystalDiskInfo
EDIT: Dude, in your photo of
ResMon you're running OSBuddy (a video game?), MalwareBytes (a scan?), Skype, FireFox and you're wondering about why your RAM has high usage? Skype, by default installation, starts on starup. You should change that using above suggestions. MBAM shouldn't be running 100% of the time in my opinion, then again I don't need AntiVirus software.