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Danger level 9
Type: Rogue Anti-Spyware
Common infection symptoms:
  • Installs itself without permissions
  • Connects to the internet without permission
  • Slow internet connection
  • System crashes
  • Annoying Pop-up's
  • Slow Computer
Other mutations known as:
Windows Diagnostic , SystemDiagnostic

System Diagnostic

Despite its attractive appearance System Diagnostic is not what it claims to be. This malicious application is a fake defragmenter tool, ready to take over your computer and attack your savings. System Diagnostic arrives at your doorstep spreading blatant lies about how it is able to improve the performance of your system. But in reality it does nothing, but slows down your computer which eventually can result in an ultimate system crash. System Diagnostic is a direct clone of such notorious parasites as Windows Diagnostic, Windows Tool and Fake HDD, and this background clearly suggests that this rogue is up to no good.

This parasite is distributed through a complex network of browser hijackers, fake online scanners, popping advertisements, and other means or redistribution. Due to the fact that most of the time it enters your system with a Trojan infection, it is hard to know when you are infected. To check your computer of any possible infections, feel free to download the suggested malware scanner.

Download Spyware Removal Tool to Remove* System Diagnostic
  • Quick & tested solution for System Diagnostic removal.
  • 100% Free Scan for Windows

As a fake defragmenter tool System Diagnostic offers you its help to defragment your files. Most of the times certain files require defragmentation, because they are stored in various places in the hard drive, broken up into pieces, which slows down the system performance. But by no means should you ever consider System Diagnostic as a reliable defragmentation tool.

Once installed the rogue will perform a fake system scan, as a result finding numerous file "errors". These problems that System Diagnostic finds are obviously not real, and you should not pay attention to any of the following messages:

Critical Error!
Damaged hard drive clusters detected. Private data is at risk.

Critical Error
Hard Drive not found. Missing hard drive.

Critical Error
RAM memory usage is critically high. RAM memory failure.

Critical Error
Windows can\'t find hard disk space. Hard drive error

Low Disk Space
You are running very low disk space on Local Disk (C:).

Windows - No Disk
Exception Processing Message 0x0000013

If you believe these messages, you will end up losing your money, because System Diagnostic will ask you to pay for the license of the full version of the program, so you could "activate" it. However, keep your credit card number safe to yourself, because if you provide it to System Diagnostic, the criminals behind this scam will be able to access your bank account anytime.

Instead, if you want to "active" System Diagnostic, use this activation key:

Don't fall into the trap of System Diagnostic. This malicious application will wrap you around its little finger before you know it. Do what is best for your computer and your own welfare. Invest in a good security tool and destroy System Diagnostic for good.

Download Spyware Removal Tool to Remove* System Diagnostic
  • Quick & tested solution for System Diagnostic removal.
  • 100% Free Scan for Windows

How to manually remove System Diagnostic

Files associated with System Diagnostic infection:

%Programs%\System Diagnostic\System Diagnostic.lnk
%Programs%\System Diagnostic
%Desktop%\System Diagnostic.lnk

System Diagnostic processes to kill:


Remove System Diagnostic registry entries:

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

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