How to remove System Defragmenter (Uninstall instructions)

System Defragmenter is a malicious program that pretends to be a computer defragmenter software, but in reality the program performs only one – displays a lot of various misleading alerts to scare you into thinking your computer have a lot of problems. However, it won’t fix these problems unless you purchase its full version. Important to note, System Defragmenter is a scam, so do not purchase its paid version.

When System Defragmenter is installed, it will configure itself to run automatically when Windows starts. Once started, the rogue will imitate a system scan and detect a lot of errors. Of course, all of these reported errors are a fake. The program only simulates functions of defragmenter software and unable to detect any problems. So, you can safety ignore the scan results.

While System Defragmenter is running, it displays a variety of fake warnings and alerts. Some of the alerts:

Critical Error
A critical error has occurred while indexing data stored on hard drive. System restart required.

System Restore
The system has been restored after a critical error. Data integrity and hard drive integrity verification required.

However, all of these alerts and warnings are fake and should be ignored!

What is more, while System Defragmenter is running, it will block all legitimate Windows applications from running. The following warning will be shown when you try to run a program:

System Error!
Exe file is corrupted and can’t be run. Hard drive scan required.

From the above, obviously, this program is an unwanted guest on your computer. System Defragmenter can`t resolve any problems. It should be removed from your computer upon detection. Follow the removal guidelines below in order to remove System Defragmenter and any associated malware from your computer for free.

Automated Removal Instructions for System Defragmenter

Step 1. Reboot your computer in Safe mode with networking

Restart your computer.

After hearing your computer beep once during startup, start pressing the F8 key on your keyboard. On a computer that is configured for booting to multiple operating systems, you can press the F8 key when the Boot Menu appears.

Instead of Windows loading as normal, Windows Advanced Options menu appears similar to the one below.

Windows Advanced Options menu

When the Windows Advanced Options menu appears, select Safe mode with networking and then press ENTER.

Step 2. Remove System Defragmenter and associated malware

Download MalwareBytes Anti-malware (MBAM). Close all programs and Windows on your computer.

Double Click mbam-setup.exe to install the application. When the installation begins, keep following the prompts in order to continue with the installation process. Do not make any changes to default settings and when the program has finished installing, make sure a checkmark is placed next to Update Malwarebytes’ Anti-Malware and Launch Malwarebytes’ Anti-Malware, then click Finish.

If an update is found, it will download and install the latest version.

Once the program has loaded you will see window similar to the one below.

Malwarebytes Anti-Malware Window

Select Perform Quick Scan, then click Scan, it will start scanning your computer for System Defragmenter infection. This procedure can take some time, so please be patient.

When the scan is complete, click OK, then Show Results to view the results. You will see a list of infected items similar as shown below. Note: list of infected items may be different than what is shown in the image below.

Malwarebytes Anti-malware, list of infected items

Make sure that everything is checked, and click Remove Selected for start System Defragmenter removal process. When disinfection is completed, a log will open in Notepad and you may be prompted to Restart.

System Defragmenter removal notes

Note 1: if you can not download, install, run or update Malwarebytes Anti-malware, then follow the steps: Malwarebytes won`t install, run or update – How to fix it.

Note 2: if you need help with the instructions, then post your questions in our Spyware Removal forum.

Note 3: your current antispyware and antivirus software let the infection through ? Then you may want to consider purchasing the FULL version of MalwareBytes Anti-malware to protect your computer in the future.