Lost connection to file on this PC from my Wife's PC, used to now not.

My wife had access to a specific file on my PC, for some reason she can no longer do that.
Her PC used to be seen on the Network from my PC now it's not there. I Have no idea why and I cannot remember how I set it up.
The File is 'shared' on my PC.

Computers not seen in network map.
Do this on all systems in network..

add "LanmanWorkstation" as an additional startup dependency for the "Function Discovery Resource Publication" (FDResPub) service, which seems to do the trick. To do this, you simply open an elevated command prompt (i.e. use the "run as administrator" right-click context menu option to start cmd.exe), then execute the following command:
sc config fdrespub depend= RpcSs/http/fdphost/LanmanWorkstation

Reboot each device after executing this command, and the devices should see each other more reliably in Network and File Manager. Redirecting

OR

If it does not show in Network map you can use this method to share

• Open File Explorer.
• In the address bar, type the following: \\computername (replace "computername" with the name of the computer you're connecting to).
• Press Enter.
• Note: You can also use ip address in address bar
• Whichever of these methods allows you to get to the other machine, create a shortcut to it on desktop, and pin that shortcut to quick access. You can then delete the shortcut from dessktop.

Note 1: If you can not access using other computer using computername or ip address, something is wrong with your sharing settings or your system is one of the stubborn ones that requires additional features to be turned on. You can try turning on the features mentioned in this tutorial https://www.tenforums.com/tutorials/111783-share-files-folders-over-network-windows-10-a.html#option1

Thanks for the post, I will explore your suggestions tomorrow when I will have more time.