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Windows 10 can’t access other PCs in LAN

I’ve been having trouble for several days with a PC (let’s call it “PC1”) with Windows 10 Enterprise on an AsRock A55M-VS. Why enterprise you may ask? Because I already tried Pro, Home and even windows 11 of the same variants and with the same end result.

I always get this error (picture below) when trying to connect from PC1 to other Windows shared folders. I don’t have this issue with any other device in my network.

Dummy pic but exact  error

Things I’ve done:

  • Network discovery is enabled
  • Network set to private
  • File and printer sharing is enabled for private and “all networks”
  • Password access is disabled
  • Enabled SMB 1.0/CIFS file sharing support in Windows features
  • Disabled Internet protocol IPV6 (shouldn’t be a problem but oh well)
  • Tried a PCI network card
  • Tried a PCI WiFi card

Services set to automatic and automatic (delayed):

  • Function Discovery Provider Host
  • Function Discovery Resource Publication
  • SSDP Discovery
  • UPnP Device Host

Symptoms:

  1. PC1 can’t access other PCs shared folders in the same LAN. Other PCs can access each other without issue. It’s a fully working LAN with several Windows machines and a Linux file server. (In the following examples “LUCAS” is my main PC)
    Got into my server, yet not into "LUCAS"
  2. If I ping or ping -4 from PC1 to other PCs in LAN I get a good response but still no access.
    Ping and Ping -4 to PC in same LAN
  3. Other PCs in the same LAN can access shared folder from PC1 with no apparent issue but sometimes, randomly, it just doesn’t show up.
  4. Other PCs in the same LAN can’t “find” printers connected to PC1
  5. Tried this in client’s LAN and in my office’s LAN. Same outcome everywhere.

I don’t know what else to try. Could this be a hardware related issue?