WindowsDiagnostic – scam. How to remove Windows Diagnostic virus.

Windows Diagnostic implies the bogus PC analysis and optimization tool that shows fake data in order to scare you into thinking that there is a serious problems with your PC. Windows Diagnostic generally penetrates to PC by means of Trojans that show fictitious error notifications and security warnings on the attacked PC. All such messages will claim that there is something really with your PC hard drive and then offer you to download and install a “remedy” that can supposedly fix the problem. When you click on of these alerts, Windows Diagnostic will automatically be uploaded and installed to your workstation.


Windows Diagnostic virus
Windows Diagnostic virus

As soon as it is installed, Windows Diagnostic will be tuned up automatically when you start Windows. As soon as it is launched, it will show many fake error notifications when you try to launch applications or remove files. Windows Diagnostic will then force you to scan your PC, which will then supposedly detect several errors that it claims it cannot fix unless you buy the rogue. When you use the so-called defragment tool it will claim that it requires to run in Safe Mode and then display a fake Safe Mode background that claims to defrag your system. Since this application is a scam do not be pushed into buying the program when you encounter its alerts. To further make you think that your PC is not running properly, Windows Diagnostic will also make it so that some folders on your system display no contents. When trying to open folders such as C:\Windows\System32\ or with some other drive letters, instead of facing the common list of files it will instead show a different folder’s contents or make it seem as if the folder is entirely empty. This is done in order to make it seem like there is some kind of serious corruption on your hard drive that is causing your files to not be shown. Windows Diagnostic also tries to make it so you cannot launch any applications on your system. If you try to launch a tool it will terminate it and claim that the tool or hard drive is corrupted. It does this in order to protect itself from some decent anti-virus devices you may attempt to run and to make your workstation unusable so that you will be further forced to buy the fake program. These are just further alerts aiming to make you believe your PC has a serious HDD error. When you perform the scan or use the fake Windows Diagnostic it will claim that there are plenty of problems on your PC, but that you first need to buy it before it can repair any of them. While WindowsDiagnostic is running it will also show fake alerts from your Windows taskbar. These alerts are meant to further scare you into believing that your PC has some kind of terrible hardware failure. Just like the fake corruption messages and fictitious scan results, all such alerts are only elaborated to scare you into buying the rogue.

Thus, the warnings shown by this program are all fictitious. This is why you should not buy Windows Diagnostic virus. Make sure and remove it using the guidelines stipulated below.

Windows Diagnostic automatic remover:

1. Download the latest version of GridinSoft Trojan Killer to clear (not infected) computer and install it.

2. Update the virus database.
3. Copy the entire folder “GridinSoft Trojan Killer” to your jump drive (memory stick). Normally it is located at the following path: (C:\Program Files\GridinSoft Trojan Killer). “C” stands for the system disk of your computer. The name of the system disk, however, can be marked with another letter.
4. Open your jump drive (memory stick). Find the folder “GridinSoft Trojan Killer” there. Open it , find the file under the name “trojankiller.exe” and rename it to “iexplore.exe”.
5. Move memory stick to infected PC, open “GridinSoft Trojan Killer” folder and run iexplore.exe. Optional: copy the folder “GridinSoft Trojan Killer” from your jump drive to some other folder created on your PC and run “iexplore.exe”.

Please watch the video explaining how to remove Windows Diagnostic virus using GridinSoft Trojan Killer:

Windows Diagnostic manual removal guide:

Delete Windows Diagnostic files:
%TempDir%\[random]
%TempDir%\[random].exe
%TempDir%\dfrg
%TempDir%\dfrgr
%Desktop%\Windows Diagnostic.lnk
%Programs%\Windows Diagnostic
%Programs%\Windows Diagnostic\Windows Diagnostic.lnk
%Programs%\Windows Diagnostic\Windows Diagnostic.lnk

Delete Windows Diagnostic registry entries:

HKCU\Software\Microsoft\Windows\CurrentVersion\Run “[random]”
HKCU\Software\Microsoft\Windows\CurrentVersion\Run “[random].exe”

4 thoughts on “WindowsDiagnostic – scam. How to remove Windows Diagnostic virus.

  1. @JV

    They are marked as hidden. Turn on ‘show hidden files and folder’ (google) and they reappear. In my case everything in my documents and settings folder was hidden.

  2. Thanks alot for this i turned on my computer today and this virus appeared. My Security centre was blocking most of the stuff but it was still appearing and so far this has helped me (im half way trhough this tutorial).

    By the way when i connected my flash drive the virus tried to turn off my PC.

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