Here's a bare-bones installation guide BTW:
(I'm not including updating the motherboard BIOS but do that if you have Memory issues and consider doing it later.. but for now avoid that as a new builder unless you feel comfortable attempting this)
1. CPU to motherboard (carefully to avoid bending pins)
2. CPU cooler (thermal pad, or if not use the approx 5mm diagonal "pea" method of thermal paste)
3. add DDR4 memory (see motherboard manual for location of two sticks... i.e. 2x8GB)
4. select "XMP" in the motherboard BIOS and save (for Intel systems)
5. run MEMTEST86 via USB stick (or CD/DVD) www.memtest86.com for a full pass or until errors
6. if working hook everything up now (power button etc section of motherboard may be confusing... note carefully the POS and NEG pins. usually NEG is black on the wire)
7. retest MEMTEST86
8. insert W10 USB stick or DVD
9. Follow instructions (**strongly recommend you have a MSN e-mail account prepared already and use the e-mail + password to setup the account during this installation)
I would setup a 200GB (choose 200,000MB) partition during the install and then assign the rest as another partition. Easier than it looks in this link:
https://www.petri.com/creating-a-partition-during-windows-7-installation
WHY?
So you can easily CLONE later to a 250GB SSD. You can put the Steam games on the 2nd partition (i.e. E:\Steam) by setting that up in the Steam library settings. I know it probably sounds confusing right now.
10. install NVidia drivers software from NVidia site
11. install audio software from motherboard site (may want/need other drivers/software but you can ask later)
12. install FAN SOFTWARE from motherboard site and setup CPU (and possibly case fans) profile
13. add Antivirus and other software
14. Steam, etc.
15. If you have another HDD then make a backup Image of the Windows partition (if you later buy an SSD then do it then.. i.e. Acronis True Image or similar to make a compressed backup Image. At the very least use the W7 backup software in W10)
SUMMARY:
I don't have everything, and I know it probably sounds confusing but it's actually very rewarding.