Windows 10: Microsoft Code-Signing PCA "not valid" and Malware removal tool says this file is malware

Discus and support Microsoft Code-Signing PCA "not valid" and Malware removal tool says this file is malware in AntiVirus, Firewalls and System Security to solve the problem; My laptop was slow of late so i ran a malware scanner and removal tool. It found an object with a .tmp extension and said that "the digital signature... Discussion in 'AntiVirus, Firewalls and System Security' started by RJ4N0CV10P657179, Mar 10, 2021.

  1. RJ4N0CV10P657179
    RJ4N0CV10P657179 Win User

    Microsoft Code-Signing PCA "not valid" and Malware removal tool says this file is malware


    My laptop was slow of late so i ran a malware scanner and removal tool. It found an object with a .tmp extension and said that


    "the digital signature on this file is invalid.

    Program is altered or corrupted since it was code signed by its author. This is typical for malware and pirated software."


    I checked the properties of this file. In Digital Signature and it says

    "the digital signature of the object did not verify"

    the issuer is "microsoft code-signing PCA 2011" and its issued to "microsoft corporation"


    There's a 'counter signature' to this, the issuer is "microsoft time-stamp PCA 2011" and its issued to "microsoft time-stamp service"


    I do not understand any of this. I only know from another forum post that microsoft time-stamp service is generally used by things like adobe and vscode. Right? Both of which I have but I don't know what do with the message I've got. Do i delete or quarantine this file? Can you explain what it does?

    thanks. freaking out here.

    :)
     
    RJ4N0CV10P657179, Mar 10, 2021
    #1
  2. LE BOULE
    Le Boule Win User
    Le Boule, Mar 10, 2021
    #2
  3. RADIORAHEEM
    radioraheem Win User
    Best way to remove problem Malware

    Hi There,

    I am trying to remove a bundle of Malware without success.

    There is a bundle of listed programs which I try to uninstall through the typical Control Panel effort, but they remain listed there:

    Buenosearch Toolbar
    MyPC Backup
    PC Performer
    Speed Test 127
    UnknownFile

    I was looking at this weblink which provides a 5 step process for Buenosearch alone:
    Remove Bueno Search (Removal Guide)

    Not sure how much certain guides can be trusted. One of the first things I read was to download Revo Uninstaller, and I've not heard of it so I'm not sure if it's trustworthy..........
     
    radioraheem, Mar 10, 2021
    #3
  4. JSSSSSSSSS
    Jsssssssss Win User

    Microsoft Code-Signing PCA "not valid" and Malware removal tool says this file is malware

    Windows Defender isnt removing malware

    Hi Jude,

    The Malwarebytes links in my prior reply do work for me...

    Suggestion to run some more scans with one or the other tool mentioned in this article:

    List of Malware Removal Tools

    I'd start with No. 3: Emsisoft Emergency Kit

    Cheers,

    Julia
     
    Jsssssssss, Mar 10, 2021
    #4
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Microsoft Code-Signing PCA "not valid" and Malware removal tool says this file is malware

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