Windows Firewall won't start, error 0x8007042c

cherruc,

Please use the following diagnostic tools to help us get to the cause of your issues:

Download: Farbar Recovery Scan Tool Download
Select the version that applies to your system: 64-bit
Save it to your Desktop.
Double-click the downloaded file to run it.

When the tool opens click Yes to the disclaimer.

At the program's console, press the Scan button.

When done, the tool produces a log, FRST.txt, in the same directory from which the tool is run (Desktop).
Please provide the FRST.txt in your reply.

The first time the tool is run, it also makes another log: Addition.txt
Also post the Addition.txt in your reply.


Also, use the Farbar Service Scanner
Download: Downloading Farbar Service Scanner

Let's get a view of all services and dependencies scoped by the tool...
Make sure the following options are checked:

Internet Services
Windows Firewall
System Restore
Security Center
Windows Update
Windows Defender

Press: Scan

When done, FSS creates a log, FSS.txt, on the Desktop.
Please provide the FSS.txt in your reply.

Thank you.

Have you tried going to a previous Restore Point at a time when this issue was not happening?
System Restore

If no joy, try uninstalling AVG 2015, and then try to start the Windows Firewall.

Also, please use the SecurityCheck Download
Save to your Desktop.
Double-click: SecurityCheck.exe
Follow the onscreen instructions inside the black box.

When done, a Notepad report opens automatically, called: checkup.txt

Please post the checkup.txt in your reply, but, do not take any corrective actions!

Let's check to make sure the WMI (Windows Management Instrumentation) is working.

Please press the Windows key and the R Key at the same time.

In the Run box, type: notepad

Copy/paste the entire contents of the codebox below into notepad:

Code:

@echo off
>look.txt (
net start winmgmt
sc qc winmgmt
)
notepad look.txt
del &0

Now in Notepad, go to: File > Save as
In the Save as line type in: wmi.bat
Change the Save as type to: All Files (*.*)
Press Save, and do so to the Desktop!!

Double-click the wmi.bat file to run it.
A Notepad report appears on the Desktop.

Please post its contents in your reply.

Let's take a look at what virus may be causing the problem (yes, you are infected!)

Scan your machine with ESET OnlineScan

1. Hold down Control and click on the following link to open ESET OnlineScan in a new window.
   ESET OnlineScan
2. Click the button.
3. For alternate browsers only: (Microsoft Internet Explorer users can skip these steps)
   1. Click on to download the ESET Smart Installer. Save it to your desktop.
   2. Double click on the icon on your desktop.
4. Check
5. Click the button.
6. Accept any security warnings from your browser.
7. Check
8. Push the Start button.
9. ESET will then download updates for itself, install itself, and begin scanning your computer. Please be patient as this can take some time.
10. When the scan completes, push
11. Push , and save the file to your desktop using a unique name, such as ESETScan. Include the contents of this report in your next reply.
12. Push the button.
13. Push

Let's see what the Eset Online Scanner reports before we proceed.

Thanks for your patience!