舊嘅 retail 版或教育版 windows 7 or windows 8 or vista 都可以 activate 到 windows 10 架。 舊嘅Pro 版就會activate 到 windows 10 pro。 32bit 嘅 key 都可以 activate 到 64 bit。 OEM 的 key 好似唔得。 windows 10 arm 版就唔得。

Get a lifetime Windows 11 Pro license for $9.97 / AED 36 on StackSocial. Here’s what you get, who it’s for, and the key ...

Equally important, but often overlooked, is the question of a valid license (get a new Windows 11 license for 50% off on the PCWorld Software store): Don’t worry, in most cases, the upgrade from 10 to ...

Tried a couple of searches here but didn't find anything exactly like I want to check... So apologies if I missed and it's already answered. I'm in the US. Checking USA Today's sale stuff pulled up ...