Parameter is incorrect Error

When reviewing the Windows Event Logs, the Parameter is incorrect error appears as a RAS Client Error 87. A RAS Client 87 error is a networking stack error. The easiest way to resolve this is by resetting the network stack and reinstalling the WAN Miniport devices.

Reset the Network Stack

1. On the affected device, open PowerShell as an Administrator.
2. Enter the following commands, pressing Enter after each command.
   1. netsh int ip reset
   2. netsh int ipv6 reset
   3. netsh winsock reset
3. Then restart the computer. If you still receive the Parameter is incorrect error, follow the Reinstall the WAN Miniports steps.

Reinstall the WAN Miniports

1. On the affected device, open Device Manager.
   1. On Windows 8 and above, this can be done by right-clicking the Start Button, or pressing Windows Key+X, and clicking Device Manager.
2. Expand the Network Adapters group.
3. For each WAN Miniport adapter, right-click the device and select Uninstall.
4. Once all the WAN Miniport adapters have been removed, right-click the Network Adapters group and select Scan for Hardware Changes.
5. Restart the machine.