how do I install guitar rig 7 on windows 7 operating system
I think that you can not since Guitar Rig 7 requires Windows 10, and further more then often too old Native Access will not show new products , and on top of that then Native Access also does not show products products not compatible with your OS.
Windows 7 is not supported by N.I. and I personally do not have a list of which software versions were compatible with Windows 7. I have a download link for G.R. 6 but I don't know if that works with Windows 7 and further more then if you do not have already then you can only get a license second hand.
my old computer worked just fine, I just purchased a new computer windows 11 simply to use guitar rig 7. Maybe starting all over again will be good for me:)