Hi there
I know it has been a while since this thread was posted so please forgive my tardiness.
I have been a user of all Serif programs since version 2.
I now have a Win 11 (prof) laptop and this would not allow me to install PP 9.
My way of getting round this was to install Orace Virtual Box ( https://www.virtualbox.org/ )
I then isntalled Windows 7 Prof (retail version) into Virtual machine. Registering Win 7 was easy using (free) phone registration. I procceded to install PP 9 and have tested it. I then copied all PP files ino the shared program foder and I can once again open all my PP files and I am able to edit etc as usual.
if you have a smallish SSD on newer PC I have Virtual Box installed onto an external HDD and it runs just fine from there This means I only have one extra step (open VB) to continue using serif programs. There are plenty of video tutorials on line if you have not used a virtual machine before just like myself. Very handy.
ErnieK