Windows 10: No Network Access.

Quick FYI; After extensive troubleshooting -the issue was resolved by unchecking protocols on both the Ethernet and then WiFi adapters (card properties) resolving both issues in turn.

Will include screenshots, and better explanation in the future.

Location:
Control Panel\All Control Panel Items\Network Connections

Checked protocols:

For a standard [Home] connection, these protocols are checked, others had caused the connection interruption.

Windows 7 Pro Single / Dual Monitor Display / Power Issue:

On some systems a BIOS setting can prevent video display on a single monitor. -This usually happens after a secondary monitor was disconnected.

Disabling the Smart Connect Technology option allows single monitor operation again.

[Asrock Motherboard using HDMI or DVI to HDMI through an adaptor.]