Windows Defender KB2267602 (Definition 1.199.653.0) claims to have bad Digital Signature - May 23, 2015 - Errors in Updates Windows 8.1 RRS feed

  • Question

  • Updated the other Windows Critical Updates on Windows Update for Windows 8.1

    Errors on Windows Defender (2) files.  The first file kept failing. Used Windows Update Fix many times. Would reboot after it claimed to fix the problem and every other combination. Finally, it hung up "installing" for over an hour. Had to power down PC. On reboot, it claimed to be installing for over an hour again. Then appeared to be installed.

    2nd Windows Defender file - same issue - won't install, Won't repair.

    Went to Services. Defender is off. Tried to start either of the two Defender services. Error Message:
    Windows Could not start the Windows Defender Network Inspection Service service on Local Compmuter.
    Error 577: Windows cannot verify the digital signature for this file. A recent hardware or softare change might have installed a file that is signed incorrectly or damaged, or that might be Malicious software from an unknown source.

    Definition Update for Windows Defender - KB2267602 (Definition 1.199.653.0)
    Download size: 148.1 MB   Update type: Important

    Monday, May 25, 2015 12:46 AM

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