Firewall Windows authorization driver is missing - mdsdrv.sys and therefore cannot start the Windows Firewall

Original title: "Missing mdsdrv.sys driver is missing on my system so I can't launch the firewall. No idea how to restore this driver? "
I tried the solution of SFC/SCANNOW - nothing appears. The TXT file is empty.

I tried the solution repair.bat - nothing - not even sure it ends; the black screen disappears without any messages

I tried the Microsoft Fix - it - nothing outside of a message 'Sorry - you'll have to Fix-it-yourself' telling me the firewall must be enabled manually. YES, I KNOW WHO!

I'm going crazy that I installed and uninstalled various malware detectors/antivirus programs and still no change. I'm sick to death of it and above which, I can not install my new printer/scanner because he needs the firewall so that it can communicate with the laptop and of course the firewall is in a coma so don't not speaking.

My husband has a computer on which the Firewall works, can I just copy the folder more or what I need to back up and reinstall Windows 7?

Hello Kiwipon_CC,

Do you have any other software installed that contains a firewall?  How long have you had this problem and have you made changes to your front the computer this error?  You have installed new software before it happens?

Firstly, I would like to launch a full analysis of the software removal antivirus and malware, you have already done.  I would then run a SFC scan to see if it can fix this problem.

SFC: How to use the System File Checker tool to troubleshoot missing or corrupted system files on Windows 7

http://support.Microsoft.com/kb/929833

Please let us know status.  In addition, please see the link below.

Windows Firewall problem:

http://social.technet.Microsoft.com/forums/en-us/itprovistasecurity/thread/0f4f6e47-afd3-45c7-8182-9487595270b1/

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