First of all, backup your registry

1. Click Start
2. Click Run
3. Type “regedit” (without the quotes) and click OK.
4. In the Registry Editor, click File > Export.
5. Make sure that “All Keys” are selected for export, give the file a name, and click Save. Make sure you note where the file is being saved to. Then, try this:

1. Click Start
2. Click Run
3. Type “cmd” (without the quotes) in the box and click Ok.
4. At the prompt, type (pressing Enter after each line):

REG DELETE HKLM\System\CurrentControlSet\Services\SharedAccess /v DependOnService

REG ADD HKLM\System\CurrentControlSet\Services\SharedAccess /v DependOnService /t REG_MULTI_SZ /d “Netman”

5. Reboot. Now, attempt to turn off your firewall.

If this doesn’t work, locate the registry backup we made earlier, double-click on it, and merge it back into your current registry. This will return your system to its original state.