How to REMOVE "BUTLDSK.SYS" VIRUS?

What is BUTLDSK.SYS?

BUTLDSK.SYS is a pretty popular virus.

BUTLDSK.SYS detected as Win.BUTLDSK.SYS.

You can get it on your computer while downloading it bundled with some free software.
Sadly, most free downloads do not disclose that other programs will be installed, so you are more likely to get BUTLDSK.SYS on your PC without your own knowledge.

After being downloaded, BUTLDSK.SYS hijacks your browser and changes search settings.
BUTLDSK.SYS also causes an appearance of popup ads and browser redirecting.

BUTLDSK.SYS is very annoying and hard to get rid of.


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Technical Information:

  • Full path on a computer= %SYSDIR%\DRIVERS\BUTLDSK.SYS

You have 2 ways to remove BUTLDSK.SYS:

You have 2 ways

Remove it automatically1. Remove Automatically.
Remove it manually2. Remove Manually.

Why I recommend you to use an automatic way?

  1. You know only one virus name: "BUTLDSK.SYS", but usually you have infected by a bunch of viruses.
    The UnHackMe program detects this threat and all others.
  2. UnHackMe is quite fast! You need only 5 minutes to check your PC.
  3. UnHackMe uses the special features to remove hard in removal viruses. If you remove a virus manually, it can prevent deleting using a self-protecting module. If you even delete the virus, it may recreate himself by a stealthy module.
  4. UnHackMe is small and compatible with any antivirus.
  5. UnHackMe is fully free for 30-days!

Here’s how to remove BUTLDSK.SYS virus automatically:

STEP 1: Install UnHackMe (1 minute)

STEP 2: Scan for malware using UnHackMe (1 minute)

STEP 3: Remove BUTLDSK.SYS virus (3 minutes)

So it was much easier to fix such problem automatically, wasn't it?
That is why I strongly advise you to use UnHackMe for remove BUTLDSK.SYS redirect or other unwanted software.

How to remove BUTLDSK.SYS manually:

STEP 1: Check all shortcuts of your browsers on your desktop, taskbar and in the Start menu. Right click on your shortcut and change it's properties.

http://BUTLDSK.SYS

You can see BUTLDSK.SYS at the end of shortcut target (command line). Remove it and save changes.

In addition, check this command line for fake browser's trick.
For example, if a shortcut points to Google Chrome, it must have the path:
C:\Program Files (x86)\Google\Chrome\Application\chrome.exe.
Fake browser may be: …\Appdata\Roaming\HPReyos\ReyosStarter3.exe.
Also the file name may be: “chromium.exe” instead of chrome.exe.

STEP 2: Investigate the list of installed programs and uninstall all unknown recently installed programs.

check installed programs to uninstall

STEP 3: Open Task Manager and close all processes, related to BUTLDSK.SYS in their description. Discover the directories where such processes start. Search for random or strange file names.

Remove BUTLDSK.SYS virus from running processes

Remove BUTLDSK.SYS virus from running processes

STEP 4: Inspect the Windows services. Press Win+R, type in: services.msc and press OK.

Remove BUTLDSK.SYS virus from Windows services

Remove BUTLDSK.SYS virus from Windows services

Disable the services with random names or contains BUTLDSK.SYS in it's name or description.

STEP 5: After that press Win+R, type in: taskschd.msc and press OK to open Windows Task Scheduler.
Remove BUTLDSK.SYS from scheduled task list.

Delete any task related to BUTLDSK.SYS. Disable unknown tasks with random names.

STEP 6: Clear the Windows registry from BUTLDSK.SYS virus.
Press Win+R, type in: regedit.exe and press OK.

Remove BUTLDSK.SYS virus from Windows registry

Remove BUTLDSK.SYS virus from Windows registry

Find and delete all keys/values contains BUTLDSK.SYS.

STEP 7: Remove BUTLDSK.SYS from Google Chrome.
Remove BUTLDSK.SYS Virus from Chrome Extensions

STEP 8: Remove BUTLDSK.SYS from Internet Explorer.

Set Internet Explorer Homepage

Set Internet Explorer Homepage

STEP 9: Remove BUTLDSK.SYS from Mozilla Firefox.

Change Firefox Home Page

Change Firefox Home Page

STEP 10: And at the end, clear your basket, temporal files, browser's cache.

But if you miss any of these steps and only one part of virus remains – it will come back again immediately or after reboot.


I use UnHackMe for cleaning ads and viruses from my friend's computers, because it is extremely fast and effective.




STEP 1: Download UnHackMe for free

UnHackMe removes Adware/Spyware/Unwanted Programs/Browser Hijackers/Search Redirectors from your PC easily.

Free Download

UnHackMe is compatible with most antivirus software.
UnHackMe is 100% CLEAN, which means it does not contain any form of malware, including adware, spyware, viruses, trojans and backdoors. VirusTotal (0/56).
System Requirements: Windows 2000-Windows 8.1/10 32 or 64-bit. UnHackMe uses minimum of computer resources.

STEP 2: Double click on UnHackMe_setup.exe

You will see a confirmation screen with verified publisher: Greatis Software. Verified Publisher Greatis Software

Once UnHackMe has installed the first Scan will start automatically

Review the detected threats

STEP 3: Carefully review the detected threats!

Click Remove button or False Positive.

Enjoy!

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