No need for the key code. Don't know that key code?
https://www.piriform.com/speccy/download can tell you. When installed you click on Operating system on the main summary page.
Maybe you can get to know your PC better. Figure out why your PC is getting so frigging fat. Do some liposuction with surgical precision instead of using a backhoe. You should pay special attention to WindirStat.
I answered a question regarding disk space over here http://www.tomshardware.com/answers/id-3425971/local-disk-space-increasing-constantly.html. That might be plan C.
I use
http://lifehacker.com/how-to-move-a-pc-game-to-another-hard-drive-without-re-1714706774 (option 2) if I need to move Steam or Origin games.
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.