RE: The mysterious and complicated tale about building a computer 🖥 from used parts

CPU speed isn't all that important for Windows 10+ (unless you are doing something CPU intensive like video editing or modern gaming) but if you don't have at least 8GB of RAM (16 GB is better) and an SSD, it's going to run like crap. If you have 4GB and a mechanical hard drive, you might as well turn it on in the morning and then come back after lunch because it will take that long before it is responsive.