Windows 10: MacBook Pro unable to ping and mapped a Windows 10 shared folder

The shared folder has always been working until I bought a new router. Installed it and then my MacBook Pro is unable to map the shared folder on my Windows 10. I tried to ping the Windows 10 from the MacBook Pro and I received a request time out. However, I can ping my printer and other devices fine but just not the Windows 10 computer. The Windows 10 is able to ping the MacBook Pro but not the other way around. How do I start troubleshooting this issue?

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Windows 10: Cannot access shared network drive Solved

w10pro unable to access remote shared folder. Ping worked fine. Previous posted solutions did not work for me.

 

Windows 10 Pro Domain computer cannot access network share from Windows 7 Pro

I have a couple of new workstations, freshly upgraded to Win 10 from factory Win 7. They have been configured for office use, MS Office and etc. They have been added to the domain. I have network mappings to (1) server running Server 2012,, no issues.
However, at satellite office there is a Win 7 Pro machine with shared drives. Non-Win 10 workstations can access and map with no issues. However, the Win 10 machines cannot. From Explorer, the Win 10 machines see the Shares, but when trying to Expand I
get "Windows cannot access \\blabla_server and the error code 0x80070035. I have disabled all Windows Firewalls, 3rd party Firewalls and AV, statically assigned IP's and about everything else on the web. From the Win 10 machine I can Ping and RDP to the
Win 7, just not map drives and access shares. From the Win 7 machine I can ping, RDP and even map drives to shares on the Win 10 machine,,, just not vice-versa!?!?! Both machines are current with Windows Updates. I have un-installed and re-installed NICs.
Can anyone help??