[Solved] How do I block an unknown device from my network?

How do I block an unknown device from my network?

sharing center

when i look at my full map of my sharing center i have a branch that goes up from my router and sais unkown with a question mark.
ive tried changing my password to my router but it still appears.
what is this? i use a belkin 450 but it still does it with
other routers.

Anwsers to the Problem How do I block an unknown device from my network?

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Hi,
 
1.
What was the recent hardware and software change made to the computer?
 
2.
Are you using a wired or a wireless connection?
 
Please follow the links mentioned below to help troubleshoot the issue.
 
Method 1
 
Please follow the suggestions mentioned by our Support Engineer  Gokul T and check if it helps.
http://answers.microsoft.com/en-us/windows/forum/windows_7-networking/unknown-and-large-question-mark-on-my-network-map/251bac71-31fb-4d22-9265-b1770ba8b7ee
 
If you still face issues, please check your adapter settings as mentioned below.
 
Method 2
 
Uncheck Power management to your Network adapter
 
To turn power management features on or off
a.
Open Network and Sharing Center (click the Start button, type Network and Sharing in the Start Search box, and press Enter).
 
b.
Click the Change adapter settings link in the upper left of the navigation pane.
 
c.
Right click the network connection you want to enable/disable power management support on and click Properties.
 
d.
Click Configure.
 
e.
On the Power Management tab, check or clear the Allow the computer to turn off this device to save power check box.
 
 
When checked, power management is enabled on the network adapter.

 
When cleared, power management is disabled on the network adapter.

 
f.
You can enable Wake on LAN for all wake methods or just enable magic packet WoL:
 
To enable Wake on LAN for all methods, check the Allow this device to wake the computer check box.

 
Hope this helps.

Manually editing the Windows registry

Caution: Unless you an advanced PC user, please do not edit the Windows registry manually.

Because of this risk, we highly recommend using a trusted registry cleaner such as SmartPCFixer Using a registry cleaner automates the process of finding invalid registry entries, missing file references (like the one causing your MACHINE_CHECK_EXCEPTION error), and broken links within the registry. A backup is automatically created before each scan, with the ability to undo any changes in a single click, protecting you against the possibility of PC damage. The best part is that repairing registry errors can also dramatically improve system speed and performance.

• Click the Start button.
• Type "command" in the search box... DO NOT hit ENTER yet!
• While holding CTRL-Shift on your keyboard, hit ENTER.
• You will be prompted with a permission dialog box.
• Click Yes.
• A black box will open with a blinking cursor.
• Type "regedit" and hit ENTER.
• In the Registry Editor, select the Error 0x9C-related key (eg. Windows Operating System) you want to back up.
• From the File menu, choose Export.
• In the Save In list, select the folder where you want to save the Windows Operating System backup key.
• In the File Name box, type a name for your backup file, such as "Windows Operating System Backup".
• In the Export Range box, be sure that "Selected branch" is selected.
• Click Save.
• The file is then saved with a .reg file extension.
• You now have a backup of your MACHINE_CHECK_EXCEPTION-related registry entry.

The next steps in manually editing your registry will not be discussed in this article due to the high risk of damaging your system. If you would like to learn more about manual registry editing, please see the links below.

Another Safe way to Repair the Problem: How do I block an unknown device from my network?:

 

 

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1. You can Download SmartPCFixer here. Install it on your computer. When you open SmartPCFixer, it will perform a scan.

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