Genuine Microsoft Software. MS Office Professional 2007 invalid VLK? - Windows Software. How to Reset or Change Microsoft Office 2007 Product License Key or Volume License Key (VLK) Note: The following steps involve modification of registry key values, which may corrupt your Windows if done incorrectly.
Backup registry first before performing the workaround. 1. Close all Microsoft Office programs. 2. Office Pro 2007 not genuine. I get an message saying my copy of Office 2007 Professional is not valid.
I purchased the copy on ebay, the product key etc. look legitimate but fails the authentication test, all office diagnostics say things are ok. What do I need to do to get a valid product key?