Angels have the Phone Box
Hi PFGrony and welcome to Tenforums.
The clean install should resolve any problems you are having currently, unless, of course, your mouse or keyboard is failing.
For activation, do not input any key during the install; your system will have been registered already with MS, and should activate either immediately, or within a couple reboots. Please remember to turn System Restore on and set a restore point as soon as the install is completed. You may also want to turn off Fast Startup.
The Windows 10 Home you purchased needs to be identified as to what it is you actually bought, before we can determine if it has transfer rights or not. An OEM/Installer/System Builder license is bound to the system. A full retail version is transferable. So, if you have a full retail version, once you have unregistered and removed it from the old machine you can install and activate it on the new one.
To unregister the key from the old machine, open an administrative command prompt and type:
Where x = your retail key code
slmgr /upk xxxxx-xxxxx-xxxxx-xxxxx-xxxxx
This will save you the trouble of having to call MS to have the key re-registered on the new system.
Hope that helps!