New
#1
If you Windows 10 boot drive is a HDD, you will suffer immensely with poor Windows 10 performance/high disk usage until you update it to a SSD.
Crystal Disk Info and HD Sentinel are good apps to use for checking drive health.
You can use Macrium Reflect to clone your HDD to your new SSD
What does HD Sentinel say about this drive's health?
Windows 10 performance will suffer without a SSD. Upgrading to a SSD is cheaper than buying a new PC, but the choice is yours.
You can probably get away with a 250 GB SSD boot drive if you manage it properly. Then difference in price between 250 GB and 500 GB is often not very big from what I've seen.
Hmmm, so maybe HDD is okay, but I can tell you 100% disk usage is often a result of HDD vs SSD boot drive. How long have you had Windows 10 installed with this HDD/PC?
It's HDD vs SSD boot drive. Nothing you can do if you want to run Windows 10 other then get a SSD or superfast expensive HDD (maybe). I would ignore any crap that tells you to start disabling this and that on Windows 10 to make it run with a HDD - if you want to try that make a full backup first so you can recover from the resulting failure.