Windows 10 will not connect to LAN/Internet via a switch

Question

A single Windows 10 machine on our small office network will not connect to the internet or LAN when connected via a switch. It fails to see any network activity and reports there's no connection. This is a new(ish) PC that's worked perfectly for a month, then suddenly no longer connects. Nothing else has changed in that time.

               [Router]
                  |
               [Switch]
    ______________|________________
   |         |     |     |    |    |
 [PC]       Printers      Other PC's

However, when connected directly to the router it works perfectly:

   ┌----------  [Router]
   |               |
   |            [Switch]
   |         _____|________________
   |         |     |     |    |    |
 [PC]       Printers      Other PC's

I've tried the following things over the last few days based on internet searches:

1. Reset the network setting using the Windows troubleshooter. The network icon in system tray shows a connection for a few seconds, then back to no connection. During that time a browser still cannot connect.
2. Changed the ethernet cables
3. Swapped the switch
4. Activated wi-fi in the BIOS and used that - connects perfectly but is against company rules
5. Swapped out the machine with a laptop, which works perfectly - this leads me to blame the machine
6. Tried a different switch port

I've run out of things to try (my network experience is minimal) now. Any suggestions would be much appreciated.

The specifications for each machine:

1. Router - ASUS RT-N66U
2. Switch - Netgear GS316 - Unmanaged
3. Windows PC Intel Ethernet Controller I225-V

Answer 1

Since we know from your tests, try both the following:

1. Reinstall/Update the Network card driver.

2. Do a TCP/IP reset, DNS Flush:

   Open cmd.exe with Run as Administrator.

    netsh int ip reset c:\resetlog.txt
    ipconfig /flushdns
   

   Restart the computer .

   This works for many situations.