Win10 can't connect to Win7 shares - here we go again

I have several Win10-64 computers running 1804 or 1809 that cannot connect to a Win7-32 computer, but the Win7 computer can connect and access the Win10 computers just fine. The error I get when I try is "Cannot access \\Computer1" (0x80070035). We are talking here about WiFi. I know suggestions about this exist all over the place, but over 3 days I have tried every one I can find with no luck. What I need is a fresh approach. Any ideas?

Notes:
1. Network sharing for private networks are all set to allow sharing and not require passwords.
2. Network sharing for public networks are all set to disallow sharing and require passwords.
3. The network and all computers don't require logon or passwords.
4. The reqistrys are all set to allow blank passwords.
4. All computers are on the same workgroup.
5. Homegroup is not being used.
6. I'm using all administrator accounts.
7. The drives I'm trying to access on the Win7 computer are all set to allow sharing and
their permissions are all set to "Everyone" and "Full Access"
8. The adapters all have "Enable LMHOSTS lookup" unchecked and "Enable NetBios over
TCP/IP" enabled.

Can you connect to the pc using IP not name is it just WiFi you can't connect

Thank you for helping. Yes. I can connect either with IP or name. I can also ping in both directions just fine. Haven't tried Ethernet. It's been working great for months, but it just stopped 3 days ago. I think what I will do next is try a restoration.

Here's some more information:
I also have all machines set to use SMB1

WIN10:
\Control Panel\Programs and Features\Turn Windows features on or off
checked: SMB 1.0/CIFS File Sharing Support
checked: SMB 1.0/CIFS Client
checked: SMB 1.0/CIFS Automatic Removal
checked: SMB 1.0/CIFS Server

WIN7 registry:
[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\services\LanmanServer\Parameters]
"SMB1"=dword:00000001

Recent Microsoft Hotfix KB4480970 was the problem. Known problem. Uninstalled it and now everything works like it should.

Check https://www.sevenforums.com/network-sharing/417957-kb4480970-breaking-local-network-access.html for additional info and solutions.

rwhite1 said:

Recent Microsoft Hotfix KB4480970 was the problem. Known problem. Uninstalled it and now everything works like it should.
Check https://www.sevenforums.com/network-sharing/417957-kb4480970-breaking-local-network-access.html for additional info and solutions.

Apparently MS later issued a hotfix. You can reinstall KB4480970 now then apply the hotfix KB4487345 from the Update Catalog . See from post #13 on in that thread.

Yes. Thank you.