Windows 10: Windows Home OEM to Windows Pro Download version upgrade

i have bought a HP laptop with Windows Home Preinstalled. i upgraded the licence to Windows Pro. Can i use the home version licence on another PC? how can i recover the home version licence key?

:)

 

Question On OEM Windows clean install......

"Flavors" of Windows licenses

Windows can be a little "odd" about license keys. There are at least 4 categories:

• Retail
• OEM
• Volume (electronic download)
• Corporate (no key needed)

For guaranteed success, the license key and media should be in the same category. If you have retail media, you may not be able to install it using an OEM or Volume license key, even though the key is valid for that version of Windows. *Wtf :wtf: Apparently, this is part of Microsoft's anti-piracy scheme (i.e., all customers are guilty until proven innocent).

 

Windows 7 Home Premium -> Professional Upgrade

Sorry for posting in this "old" topic but I also have a question regarding this problem:
I have a Windows 7 Home Premium Version 32 bit and I want to upgrade to Windows 7 Pro. The Home Premium was not a OEM version and now I wanted to buy a OEM Windows 7 Pro version which costs 30€. Is it possible to upgrade a non OEM version with a OEM version or is this not working?

Many thanks in advance!

 

Anyone can upgrade to Windows 8 Pro for $14.99.

Microsoft cracked down on the upgrade requirements you now need a windows 7 key OEM or Retail but the code its self needs to be one they listed in there upgrades system, So old keys wont work.