Slow performance when you use a mapped drive to copy files to a remote server from a Windows Server 2003-based computer

Slow performance when you use a mapped drive to copy files to a remote server from a Windows Server 2003-based computer: "Slow performance when you use a mapped drive to copy files to a remote server from a Windows Server 2003-based computer"

Also this can help too YMMV

1. Open an elevated command prompt and press Enter:

netsh int ip set global taskoffload=disabled

2. Disable and re-enable the network interface.

3. Run the following command in an elevated command prompt to confirm the command above is successful:

netsh int ip show offload