Business software won't run on Win10; options for post-2019 security?

We use very specific software for our business that does not run reliably on Win10, so I have prepared a couple of extra backup computers running Win7 that can hopefully keep us running through about 2023, at which point we'll need to reassess our situation. Until then, however, can we use something along the lines of ZoneAlarm or another 3rd party utility to protect our computers after 2019, when support from MS ends?


If it's felt that that option is not sufficiently secure, can I run a Win7 WM and expect better security by virtue of the extra layer that the host OS affords? Or is it that since the IP address is different from the host, the same level of insecurity in the VM would apply, and the only upside is that by using a VM, a clean backup VM could be substituted at relatively short notice.


Thanks in advance for any guidance here.

@lehnerus2000, thanks for your reply, and for moving my post to a more appropriate location.
The software is installed either as a client or as a server. The client installations work fine on Win10, but some installed supporting components required for server installations do not function properly on Win10, dropping the connection to the network frequently. I tried all sorts of things, from static IPs to reserved MAC addresses via the router, but simply using a Win7 computer as server solves all of the problems.


Yes, the computer involved does require internet access beyond the LAN, so I was hoping we could continue as we are, just substituting 3rd party firewall/AV software for the current Microsoft security updates, as of 2020.


If not, I could set up Win7 as a VM in WMware, essentially making the installation relatively "replaceable".
But I would be less happy, obviously, as the server performance would take a hit.

Thanks, I'll test a copy of Windows 7 in a VM and see if it's practical. All of our computers run on SSDs, so we might be OK.

Thanks again for your suggestions, lehnerus2000.