Downgrade a laptop to Win 7

I agree with the others that its iffy at best. Do your homework and make backups before you even attempt to do it.

You say you have your Win 7 disc. If its an OEM that came with a new PC, it is "legally" only licensed for the PC it was delivered with.

I've just checked the cost and availability of Windows 7 currently on sale - assuming that your existing copy is not a re-usable retail copy, which is by far the most likely here in the UK - the price varies greatly from <£10 to >£200.

Interesting thing is that my Bitdefender Anti malware suite blocked all of the websites as dangerous

Now that Microsoft is not selling any more fresh copies this would suggest to me that it will be very difficult and possibly expensive to Downgrade from a current Windows 10 system to Windows 7

OEM actually means as it always has - Original Equipment Manufacturer, which translates to - you must sell the completed PC and OS to a third party to qualify to purchase an OEM licence. Microsoft have not always been too strict on this condition of purchase in the past but they are entitled to refuse, licensing support or sale at their discretion.

Both the suppliers quoted are not really useful to a user outside of the US as by the time you add in import duties and international shipping the price is too high

Also of course local legal definition in Germany and some other countries state that a licence cannot be tied to a hardware package and becomes the property of the purchaser and thus resellable in the future


EDIT

Newegg do have an outlet in the UK - but they do not carry Windows 7 as for as I can see

It's a strange thing as Microsoft were at times strict on this and at times they were very lax.

The basic licensing system was split three ways ...

• The volume licensing used by Corporate customers, governments and Schools and Including the MAK licences for remote devices that could not be connected to the Key Management Servers often enough to make them viable for business use ( laptops Remote comms stations Etc)
  
• The Retail licences which were transferable as you stated as long as they were only installed /Active on one system at any one time ( interpretations varied as to whether an installed but unused system was legal or not.
  
• OEM Licences which were not transferable under any circumstances - these included those using SLC embedded keys from major OEMs and those small system builders with a key that would normally include the OEM letters in the Key . These were reusable within reason on the same hardware where one or two of the monitored hardware failed but not the Motherboard without a call and agreement with Microsoft.

There are are set of licences that are a strange brew and those are those that were issued as part of several Microsoft schemes including Technet MSDN and specialist Schools packages which were not VL strictly but acted like a Retail MAK key

Also "Installed" included all Devices whether Physical or Virtual so Window7 system with a Windows 7 Virtual machine would need two licences as to use the VM you needed the licence for the Host and a licence for the hosted OS