|Your switch is not managed and I doubt SNMP (not smnp) is going to be of any use in this situation.|
You need to check that all computers in your network use the exact same workgroup name. If any of your computers are using a different workgroup name, they won't be seen from the main workgroup.
I then have another CAT5 cable connected to a port on this switch, extending to a D-Link DES-1024D (another 24 Port, 10/100 switch)
If it were me, I'd have this switch plugged into a LAN port on the SOHO Router if that's feasible. When you daisychain switches, you aggregate the bandwidth.
The way you have it setup now, your Netgear FS524 switch carries it's own bandwidth as well as the full bandwidth of the D-Link DES-1024D.
If you give the D-Link DES-1024D it's own feed from the router, then the Netgear FS524 will no long be carrying it's bandwidth.
It matters not how straight the gate,
How charged with punishments the scroll,
I am the master of my fate;
I am the captain of my soul.