Can I use a hard drive with Windows installed on a new build?

[palmz]

This is probably a stupid question but I'm VERY new to pc building. I'm about to build my first pc, if I boot it up with my previous hard drive that has Windows 10 installed what will happen?

 

[k19_window_maker]

other than the drivers you have to replace , it shows part of your RAM as unusable

 

[velocityg4]

Best case it will work fine. Odds are it will work but you'll spend ten fold more time hunting down and repairing reliability issues than if you had just performed a clean install. Worst case it won't boot.

If your license is an OEM license. You'll also likely need a new license. Only retail licenses can officially transfer. Although some people have success transferring an OEM license. In either case you'll need to link your license to a Microsoft account on the old PC first.
https://support.microsoft.com/en-us/help/20530/windows-10-reactivating-after-hardware-change