I asked you specifically HOW you attempted to clean the disk -- would appreciate a reply, not a screenshot.
That shows 100% utiilization -- meaning something is tying up the drive nearly constantly, and my suspicion is Windows Update.
Any new PC running Win10 is using an OS that could have been installed weeks or months ago, so when you first use it, it is going to connect to the Microsoft servers and look for Windows Updates. This sucks up major processor resources and will effectively slow you PC to a crawl. It will continue doing this until it has found all the updates your PC needs, downloaded them all, and installed them all. Apart from partially disabling Updates, there is nothing you can do about this.
And ... if you RESET your PC, you make the matters worse because you start this process all over again.
To check for Windows Update running, do the following:
1) Enter Services in the search area
2) Select Services when it appears
3) Scroll down the list until you find Windows Update
4) If it is running, then double-click it and under Service status: select Stop
5) After if stops, see if your performance returns to more normal speeds.
If it does, then it was Windows Update using up the bulk of the processing power.
Good Luck
