Aus meiner Erfahrung konnte ich das Problem wie folgt lösen:
- Herunterladen der Combofix.exe und Malwarebytes Antimalware.

- den PC im abgesicherten Modus starten und zuerst einen vollständigen Scan aller Laufwerke mit Malwarebytes durchführen

- die gefundenen Viren Löschen

- Im Anschluss Combofix ausführen (Machen lassen, Finger weg vom Rechner bis alles fertig ist - die Software führt eigenständig einen Neustart durch!)

Danach war Ruhe mit dem System Tool.
Die Beschreibung zur manuellen Entfernung findet Ihr unten.

What is System Tool 2011?

System Tool 2011 with an alias SystemTool is a virus made to look like a legitimate anti-virus program but in reality it was a piece of fake application or commonly known as rogue security program. It will arrived on computers as a recommended virus removal tool from a fake online virus scanners. Instead of getting rid of computer threats, victims will experienced a more disturb computer system. A continuous pop-up alerts will be displayed accompanied by a promotion to get the licensed version of System Tool 2011. Some Windows functionalities will be rendered unusable like task manager, registry editor and control panel. This was intended to prevent users from removing System Tool 2011 manually.

While finding it hard to remove System Tool 2011, some will resort into purchasing the registered version of this useless software. Bu doing so, victims will be brought to an online payment processing web site where credit card information will be requested. Providing this details may cause charges to credit cards for other unknown transactions. Instead to obtaining this potentially unwanted program. You might as well get a free version of a needed anti-malware program that was known for its ability to take out malicious programs from the infected computer.

Type Rogue
Sub-Type FakeAV
Aliases
OS Affected Windows
Detected By MalwareBytes

What are the Symptoms of System Tool 2011 Infection?

It will modify Windows Registry and add the following entries:
HKEY_CURRENT_USER\Software\System Tool 2011
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run “5648541024″
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run “[random]”

The threat will drop the following malicious files:
%AppData%\[random]\
%AppData%\5648541024
%AppData%\5648541024\5648541024.bat
%AppData%\5648541024\5648541024.cfg
%AppData%\5648541024\5648541024.exe
%UserProfile%\Desktop\System Tool 2011.lnk
%UserProfile%\Start Menu\Programs\System Tool 2011.lnk

How to Remove System Tool 2011 Manually

1. Restart your computer in SafeMode
- Press F8 on keyboard as soon as you turn on the computer
- Select SafeMode to start the computer loading only minimal resources

2. Delete Windows registry entries the malware created. It is important to BACKUP YOUR REGISTRY FIRST.
- On Windows Start Menu, Click Start > Run
- Type in the field, regedit
- Find registry entries mentioned above and delete if necessary

3. Files related to System Tool 2011 must be deleted:
- Browse and delete malicious files detected above.
- Some files cannot be deleted instantly. Press Ctrl+Alt+Del to open Windows Task Manager, look for any virus-related files mentioned on this page and highlight it, click End Process. Try to delete the file once more.

4. Run Antivirus Program
- You must be connected to Internet to be able to update your anti-virus program. This is needed to have the latest database available and detect newer threats.
- Thoroughly scan the computer and clean or delete all detected threats.

Automatic Removal of System Tool 2011

1. Print this procedure as we need to close all running programs later.
2. Download MalwareBytes’ Antimalware here and save it to your Desktop.
3. Close all open applications.
4. Double-Click on the downloaded mbam-setup.exe to start the installation. If unable to execute, infections on computer is preventing it from running, rename the file mbam-setup.exe to anything (like myfile.exe)
5. Run the installation on the default settings. No changes are necessary.
6. Just before completing the installation, make sure that the following are marked check.
- Update Malwarebytes’ Anti-Malware
- Launch Malwarebytes’ Anti-Malware

7. MBAM will run and update itself after installation. Close MBAM after the update.

8. Restart your computer in SafeMode
- After Power-On the computer, just before Windows start, press F8
- From the selections, Select SafeMode

9. Click on the MBAM icon and start to Perform Full Scan to begin scanning your computer for System Tool 2011 related files.
10. After scanning, a message will appear stating that the scan is completed successfully. Click OK.
11. Click Show Results and detected threats will be displayed.
12. Make sure that all threats are marked check, then click Remove Selected to begin removal of the malicious files.
13. Exit MalwareBytes’ AntiMalware and restart your computer.

14. System Tool 2011 and all its files are now removed from your computer. To protect your computer from this threat and avoid future infections, you may want to obtain a Full Version of MalwareBytes’ AntiMalware.

http://www.im-infected.com/rogue/remove-system-tool.html

http://www.fasterpccleanclean.com/de/system-tool-entfernen

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