OK, w10 has had several years to get rid of its teething pains. BUT Microsoft is discontinuing support for W7 this coming January. DO NOT PANIC!!! You can still get W10 for free from Microsoft.

Just enter "download Windows 10" into your search engine and look for the link that says "Media creation tool." Follow the instructions and you should have no trouble. I've done 8 machines this week, including machines that were password protected. [I did not have the passwords.] If your machine has a valid key, enter it if you are asked for it. I only had one ask me and, after I entered it, everything rolled merrily along.

With the protected machines, use the tool to put the [universal] upgrade on a disk or thumb drive and use the boot Options on your opening menu.

Have fun. The only machines that have fought ack were two with Atom processors.