sharing file between computer  

Hi, how are you trying to share the files and folders? Networking over a LAN?

Background- have you ever had networking set up and working? Has it stopped working? Or is this the first time you've set it up?

This takes patience and perseverance checking and rechecking relevant settings on each PC as detailed in this tenforums tutorial
Share Files and Folders Over a Network in Windows 10

(please feel free to search and browse the huge library of professional quality tutorials:
https://www.tenforums.com/tutorials/)

Once you have this configured correctly, note that it may take 20 mins or more for a PC to appear on the network after login. This delay can be overcome by running a small script at logon on each PC as has been posted a number of times on tenforums.

Yes, this is a messy untidy area of Windows.

Win 10 Professional wit all the updates

Sadly this is relatively meaningless, which is why the forum pronpted you thus so we don't have to keep asking:

Walter,

See my checklist at A consolidated network setup checklist [post #108] - TenForumsTutorials

Denis