I am looking to purchase a version of Microsoft office ,but not the new 365.
I don't care if the version is a few years old.
Ideally it should have the following .
One off payment,install countless times on different PC,s ,but only one at a time & be computable with W8
I have tried most shops ,all sell 365 .have checked eBay,but am concerned about the versions that can only be installed on one PC .
Any advice appreciated .
AFAIK, the only version of Office that can be legally installed on multiple PCs would be a corporate licence version. Otherwise, it's limited. That said, I've known people install Office 2003 on multiple PCs, and nothing terrible has happened. It's not legal, so it would be at your own risk. You'd then need to download the compatibility pack that enables Office 2003 to read Office 2010 files - e.g. .docx.
Had you considered Open Office? It's free, it's supposedly compatible with Office files, it's very well reviewed - and it's free.