Have you ever experienced a red X 
on the network icon in the taskbar on Windows 7?
Symptoms -
- Red X on the network icon (by time on taskbar)
- Still able to go to the internet
Click “Start or orb”
Run or Search box
type “dcomcnfg” and hit enter
Find: Component Services-Computers-My Computer-DCOM Config-netprofm
Right click “netprofm”
Click on “Properties” select “Security”
Navigate to “Launch and Activation Permissions” section changed to “Customize”
Click “Edit”
Click “Add..” Type “LOCAL SERVICE” as the object names then click “OK”
In “Permissions for LOCAL SERVICE”, select “Allow” for “Local Launch” and “Local Activition” Click ”OK”, Click “OK”
Reboot
All of the Windows Services should restart and you should be able to join domains, have the icon repaired and be able to perform all network tasks.
In the case where it is greyed out – On the general tab, you will see the Application ID. Write this down. Now open up regedit.
- Go to HKEY_CLASSES_ROOT\AppID\the app id
- Right click on the key
- Permissions
- Advanced
- Ownership – Change to the Administrator
- Click Apply and OK
- Give the Administrator Full Control
- Close out the registry
Other common problems may be-missing Network Adapters under connections
If you have this problem (above) you may need to re-register 3 dlls. Follow these steps. (Error normally found in Windows XP or 7)
Start, Run. cmd.exe
regsvr32 netshell.dll
regsvr32 netcfgx.dll
regsvr32 netman.dll
Also make sure Simple TCP/IP is enabled by following these steps:
a. In Control Panel, double-click Add or Remove Programs.
b. Click Add/Remove Windows Components.
c. Click Networking Services, and then click Details. Verify that Simple TCP/IP Services is turned on
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