When I try to turn-on the Windows firewall, I get the error code 0x80070422 which states "Windows Firewall can't change some of your settings." I could not find any solution on Microsoft website.
I was hoping here someone would know the problem or guide me to the right direction.
Malware is usually the cause of this, so scan for malware first, see my post in this link
If it is clean of malware or you removed malware follow this procedure next.
Perform the following steps and update the computer:
Click Start, type Notepad in the Start Search box, and then click Notepad in the Programs list.
Copy the following text, and then paste the text into Notepad:
sc config wuauserv start= auto
sc config bits start= auto
sc config DcomLaunch start= auto
net stop wuauserv
net start wuauserv
net stop bits
net start bits
net start DcomLaunch
Click File, click Save As, and then type Repair.bat.
Try enabling the firewall after these steps.
I'm not sure this would help, but you could try: http://support.microsoft.com/kb/947821 as it helped me with a similar issue.
Open Control Panel and go to Administrative Tools. Find and run Services. When Services window opens find Windows Update service and double click it to open its Properties.windows update error In Windows Update Properties find Startup Type and from the dropdown choose Automatic. Also check the Service status, and if the status isn’t set to Running click the Start button in that section to start it. Click OK to save your settings and restart your computer
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