I have a Lenovo N22 laptop running a fully updated Windows 10 Pro (20H2). A week ago I had a Netgear router running with a private class C LAN IP address range. The router was at address 204.107.91.254. Everything on my network worked fine, including the Lenovo.
The Netgear router turned out to...
UPDATE! RESOLVED BY UNINSTALLING "Update for MS Windows KB2732500"
Hardware setup:
Dell Studio 1558 laptop, Windows 7 Home Premium, Service Pack 1, 64-bit O/S, Intel Core i3
Linksys E1200 wireless router
Comcast cable modem (by Motorola)
After functioning on my home WLAN for over a year...