Invalid Serial number on re-installation (Acrobat XI Pro 11.0.07)

[Karl27355737x0yv]

I reloaded my PC and attempted to re-instal my regisetred version of Acrobat Pro XI. At the promt for serial number, I copied and pasted the serial number from my products page (where I also downloaded from). It says "Invalid Serial Number". Anyone point me inthe right direction? 

[Bernd Alheit]

Try the forum for Adobe Acrobat.

[try67]

Did it contain anything but numbers?