Why did?t HTMLframes works in Windows 10?

[Windows Central Question]

I got a site with a mainframe, split in 3. When I click on "Back" should everything starts frpm the beginning but it?s starting in one of the frames. Testinglink www.siggesdata.se and click "ByggSigge" and efter that click "Tillbaka". I got 3 computers, 1 with XP, 1 with W9 and 1 with W10. The ather 2 work perfect.