I am trying to Format and Reinstall my Laptop Sony VPCEB37FG but it seems when it was added to the Work Domain the previous IT guys Wiped my Hard Drive incl my Recovery Partition.. don't have any recovery discs either... 
Tried downloading the WIN 7 ISO Image using the MS Website https://www.microsoft.com/en-us/software-download/windows7
but getting this Error
The product key you entered appears to be for software pre-installed by the device manufacturer. Please contact the device manufacturer for software recovery options.
Also since it was joined to the domain the WIN 7 they loaded was Volume licensed and since can't authenticate anymore..
How can I convert my Product key to work or is contacting Sony SA the only way ?
Tried downloading the WIN 7 ISO Image using the MS Website https://www.microsoft.com/en-us/software-download/windows7
but getting this Error
The product key you entered appears to be for software pre-installed by the device manufacturer. Please contact the device manufacturer for software recovery options.
Also since it was joined to the domain the WIN 7 they loaded was Volume licensed and since can't authenticate anymore..
How can I convert my Product key to work or is contacting Sony SA the only way ?