$25 K??!! Why the heck so much unless you have some exotic hardware. You can buy a good computer for $2K or much less, and transfer the files and software to the new box from the old one. I resisted Win10 for a long time but finally gave in and find that it runs just about anything Win7 does. There are some exceptions, generally old games and with enough persistence you can get those running. One of your local computer shops can handle the whole thing for you.
But for Win7 you can keep on running it until the computer dies, no security updates so get a good antivirus if you go online at all.