This answer started the TLDR craze.
The following answer is a c+p of another answer of mine from http://www.tomshardware.com/answers/id-3425971/local-disk-space-increasing-constantly.html?siteFrom=EPR-8807#xtor=EPR-8807.
While it may stray from your answer I think it will help you as well. Driver updates can sometimes cause issues. Hardware is pretty good but it's also pretty dumb. Without its instructions(driver) it can't do anything. I would check your task manager and your Services. Right click your task bar and click on task manager. Look through the list and see what is running. Then you figure out why each process is running. Then you figure out if that process is necessary. After you trim the fat from there you can click on the Services tab within task manager. Then click on Open Services near the bottom of that window. That list is very long. Trimming the fat from there can be tedious. It can also be dangerous. It can also be very rewarding. Make your PC quicker, rewarding. You then click on the Start-up Type tab. See all those services that start automatically? Finding out which ones can be set to manual and which ones that can be disabled and which ones you should NEVER touch involves some Googling. Okay. A LOT of Googling.
Consider this. You go to a county fair. You are the first one there. You then have to wait for the workers to get there and start up whatever they own. Whether it's the Tilt-A-Wheel or the Help Station they need to start. They have about 30 different things that they need to get going. It doesn't take too long. Now you head over to Disneyland. You are the first one there. The start-up procedure will be much longer and will consume a LOT more resources. The same applies to your PC. Have a TON of services set to automatic and it can slow things down.
Ccleaner(link below) can help on multiple fronts. In addition to being a junk cleaner it also has Tools. Start-up is one of those. So... Click on Tools and then click on Start-up. Go through each tab from windows to Tasks? and see what is set to start when Windows starts. See what you can disable or delete.
After you have all your ducks in a row and everything is nice and neat it's then time to check for stowaways. Malwarebytes is a good place to start. Malicious software is notorious of slowing down PC's if they don't render them useless first. Each person has their own combination of security. Some will use Comodo instead of WIndows' firewall. Others swear by AGP and still others have to have Norton in addition to Windows' fireawall and Defender. Others go overboard. Security software is jealous. It's an alpha bit. Some don't mind sharing the security detail. Others throw a fit. Make sure your security you are considering will be compatible with your other security.
Do you have Hibernation enabled? Do you use it? DO you have to use it? Could you use sleep instead?
https://www.howtogeek.com/howto/15140/what-is-hiberfil....
That can save you Several GBs worth of space. It saved me between 7 and 10GB. Been a while since I've disabled that. How much could it save you?
Hibernation will grow every day and the user can see that very clearly if they are low on disk space.
Is system restore enabled? You can Click start/ type System Restore and then click on Create a Restore point. You can then see if system restore is on. If it is you can click on Configure and delete all restore points. That can return 5GB or more. Yesterday I was at a little over 7GB worth of SSD space being used for my C drive. Today I was at a little under 9GB. Our workloads are completely different. So too will our SR sizes be different. When you click OK to close that screen make sure you Create a restore point before exiting it completely.
System restore also grows daily.
Have you cleaned your junk files?
https://www.piriform.com/ccleaner/download can help with that. It does a better job than Disk Cleanup. You can leave Wipe Free Space unchecked. You can also decide which temp. files are deleted. Want it to not erase your saved passwords? You can do that. Depending on the time it's been since your last cleaning this step can save return several more GBs to your C drive.
Junk files will also add up if not cleaned.
https://windirstat.net/ is a utility which gives a visual indication of disk usage. See those large chunks of data
They are using the most data on your PC. It shows you a file tree but you can also click on those blocks and right click on Explorer here and go directly to that file. The program can show you where you can possibly save the most space.
To be frank I'd invest in an SSD. and double your RAM if you ever can. That will help A LOT. But so too will cleaning up your HDD.
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