Windows Cannot Acess \\IPaddress\sharedfolder

Hello,

Sorry for the late reply....
The output on the Client PC and your Server looks great and there's no issue there.
I would investigate on the hardware side if you have not done this route yet. Try changing the network cable, using Cat5e or higher category is better.

This time it lasted around 2/3 weeks before the "connection" dropped out.

I don't know if you done driver update, it might do wonders.

Also, changing the Speed & Duplex might be another option - you may try 1Gbps(if your NIC supports this) or 100Mbps, see attached image.

Network hiccups, maybe you've rebooted some devices that helped.