I have an Acer Aspire V3 551G-X419 laptop, and it came pre-installed with Windows 8 (I assume Pro). I took note of the installed product key (got the key via some app). This laptop has UEFI boot, along with Secure Boot. This laptop was refurbished, so no OEM recovery discs. The HDD was wiped clean, so no recovery partition either. The RTM disc of Windows 8 I have won't work, saying "The product key entered does not match any of the Windows images available for installation. Enter a different product key.". Install won't let me enter another key, and thus, doesn't proceed. Using the Windows 8 Upgrade Assistance program with the key leads to a "This product key cannot be used to install a retail version of Windows 8". I'm looking for a way to cleanly reinstall Windows 8 pretty much. Any ideas?