(Technically, it’s a conversion, but it works like a transfer.) Whether retail or OEM Windows, once you upgrade to Win10 you’ve effectively transferred your single license to the new OS. OEM versions of Windows usually can’t be moved to other PCs and, as with retail Windows, can have only one installation at a time. The original OS passes the activation checks normally.īut the usual caveats apply, just as they did before Win10:įor full, retail copies of Windows (where you buy the OS separately from the hardware) the license will work with any suitable PC hardware - but only on one system at a time.įor OEM versions of Windows (where the OS comes with the PC), the license usually stays with the original hardware, even if the system came with setup/recovery discs. I’ve done it on several different machines without incident. Yes, if you roll Win10 back to Win7 (or Win8) on the same hardware, the old license will still work. “I’m actually interested in being able to use both versions of Windows in parallel, but there’s still the underlying concern.” I’m sure that would technically work, but will the free upgrade not cancel the Win7 license? Could we discover the Win7 system can no longer be activated with the original key?
Plus: A biometric/fingerprint sign-in fails after a Win10 upgrade, and a reader’s old PC becomes uselessly slow after an upgrade - to Win7!Īdvice on rolling back a Windows 10 upgrade LANGALIST PLUS Questions about rolling back a Win10 upgradeĪ reader wonders: After rolling back Windows 10 (undoing the upgrade), will he have the original Win7/8 product key?
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