Why does my VPN keep disconnecting?

One good thing about virtual private networks (VPNs) is that when they don't work, the problem is almost always solvable ...
ZDNet

If you've had VPN problems since the April Windows update, here's your fix

Windows users who ran into VPN connection issues following a faulty update in April can now fix the problem courtesy of the May update. On Tuesday, Microsoft rolled out its Patch Tuesday update ...