"computer is that It can not detect any of my computers on my network"
So you can not ping the other computers IPs? Or do you mean they just do not show up in the computer browser list - which is completely and utterly a waste of time just eye candy to use.
And has NOTHING to do with actual access to the other computers shares btw
First thing - drop to a cmd prompt, ping another computer by host name of that computer? Does it resolve to IP, is the IP correct - does it return answer to the ping. If resolves - but does not ping most likely software firewall on that device does not allow ping.
But to fix your browse list - who is the master browser on your network is the biggest thing to know!! So for example on my network its
LANscanner v1.3 - ScottiesTech.Info
I5-W7 192.168.1.100 18-03-73-B1-0D-D3 LOCAL
STORAGE 192.168.1.8 00-0C-29-57-41-D5 LOCAL MASTER
You can grab that free tools here http://scottiestech....dows-workgroup/
You can verify that with simple nbtstat -A command
C:\Windows\system32>nbtstat -A 192.168.1.8
Node IpAddress: [192.168.1.100] Scope Id: 
NetBIOS Remote Machine Name Table
Name Type Status
STORAGE <20> UNIQUE Registered
STORAGE <00> UNIQUE Registered
LOCAL <00> GROUP Registered
LOCAL <1E> GROUP Registered
LOCAL <1D> UNIQUE Registered
..__MSBROWSE__.<01> GROUP Registered
MAC Address = 00-0C-29-57-41-D5
And yes its verify import to know if this is wired or wireless.. Many routers can block client to client communication over wireless, AP Isolation, WLAN Isolation, etc.. This could cause issues in the browse list for sure.
Here is a good doc in troubleshooting browsing issues
Troubleshooting Computer Browsing on SOHO Networks with Microsoft Windows
As to discovery being off in your sharing center - just means your computer browser service is off, and you can not be the master browser is all. Has nothing to do with seeing a browse list if there is a master browser on the network with a current list
as you can see mine is OFF, and I see the other currently on windows box on my network.