I wish you luck unless you know someone who has old dusty stock of Win7. 
Win7 hasn't been available for purchase for over 2 years. Support for 
Win7 will cease (no more security patches) in January 2020. You should 
tell them to upgrade to Win10. But be sure you read Woody Leonhard's 
advice (on askwoody.com) about which version to install and how to avoid 
Microsoft's update madness. If your customer has computers that are 
connected to the Internet, and they have Win7 installed after MS support 
stops, they're asking for major trouble.

Peter wrote on 26/01/2019 11:34 AM:
> A customer is running entirely on Win XP Pro. I will be encouraging him 
> to upgrade this Spring. I prefer Win 7, I am a "Never-10" kind of guy, 
> but I will not influence what he wants to do so he may well elect to go 
> to Win 10.
> 
> The question is which version of WPO is going to give us the least 
> amount of grief?
> Sys Requirements:
> WPO 7 Pro: Win 8.1/7/XP
> WPO 8 Pro: Win 10/8/7
> WPO 9 Pro: Win 10/8/7
> 
> I know Pdox is the same as it was from V.11 but I am wondering if the 
> newer versions will play nicer on Win 10 (or 7).
> 
> Another consideration is if he decides to go with WPO 8, will it still 
> read the older version (WPO 9) tables and undelivered forms etc.? Thank 
> you.
>