How Can I Get Rid of BUTLDSK.SYS Forever?


We normally classify BUTLDSK.SYS as a Trojan and in most of the case people may not notice it even after BUTLDSK.SYS has got inside their computer for a long time. BUTLDSK.SYS is very good at concealing itself so that it can escape from many users’ eyes. But it is very dangerous, and normally it will result in a series of huge damage which is enough to destroy your computer system. These two features make people associate to the Troy Trojan and that is why BUTLDSK.SYS get its name.

BUTLDSK.SYS is a very tricky item and it will take advantage of all the stuffs on your computer. It is able to get the information from your online activities. It can speculate which documents or archives are most frequently used and will take them as the most important ones. And then, it will try to control these documents and make profits from it.

How does it happen? BUTLDSK.SYS will first encrypt the documents and set obstacles for you to open it. When you want to open it, you are surprised find that your documents are required the password. And then, it leaves you two choices. For one is to give up these documents, and for another is to pay for the passwords. It is your choice!

It is not smart to keep BUTLDSK.SYS on your PC and narrow down your options. Therefore, please refer to the following guides which will help you to get it deleted.


How did I get infected with BUTLDSK.SYS?

BUTLDSK.SYS programs don’t pop up out of thin air. Neither did the one behind BUTLDSK.SYS. It may seem like it appeared as if by magic. But there’s nothing magical about its invasion. In fact, it’s quite simple. The tool asked if you wish to allow its installment. And, you did. If you hadn’t, you wouldn’t be stuck seeing BUTLDSK.SYS non-stop. Don’t be too hard on yourself, though. The exchange wasn’t as straightforward as you may imagine. After all, if the adware outright popped up to seek access, you’d deny it. Right? Well, it doesn’t take that chance. Instead, it uses the old but gold means of invasion. Spam email attachments, corrupted links, fake updates, freeware. There are plenty to choose from. It’s up to you to catch it in the act. Because, no matter how sly or deceitful the adware is, you CAN prevent its entry. Be extra thorough when installing updates, tools, or anything else that you get from the web. A little extra vigilance can’t hurt, but it CAN save you a lot of troubles. Always read the terms and conditions. Check the fine print. Do not rush, or give into naivety. Carelessness invites infections. Caution helps to keep them out.


Easy Guide to Remove BUTLDSK.SYS completely

(Guides for Windows PC: Chapter 1、Mac OS: chapter2. )

If you are a Windows User, please start from here;

If you are a Mac User, please turn to the next Chapter below.

Chapter 1 Remove BUTLDSK.SYS from Windows PC

Step 1 Scan the Windows PC with SpyHunter Anti-Malware

(SpyHunter Anti-Malware provides free scan service and it is easy to use. It scans, detects and removes any malware, virus, rootkit, as well as threats like BUTLDSK.SYS. The tool is powerful enough to find malicious items that are hidden on the computer.)

1 Download SpyHunter Anti-Malware by clicking the links below. Save it to your Desktop so that we can get access to it easily.

2 After downloading, double-click SpyHunter-Installer and start the installation.

3 Click Run to start the installation procedure.

4 It will provide you language choices, choose the one you want and click OK.

5 You need to accept the End User License Agreements before SpyHunter Virus-Removal Tool can be installed onto the computer. Choose ‘I accept the EULA and Privacy Policy’. Then, click Install button.

6 Then the installation is in progress and after the page of “setup successful” turns up, click EXIT.

7 After installing SpyHunter, click on Scan to begin checking the system for presence of rootkit and virus. The tool reveals items that were found linked to BUTLDSK.SYS and other malicious programs.

8 When the scan is completed, the page will display all the threats and all the dangerous results. Click Fix Threats to remove all of them.

Step 2 Fix all Files damaged and protect the computer with RegcurePro

1 Download the tool called RegcurePro from the links below.

2 Locate the file and double-click RegCureProSetup to start installing the tool. After reading the Software End USER LICENSE AGREEMENT, please click Accept and Install to continue.

3 When RegcurePro is installed, it will automatically run and Click to Start Scan button will help you to detect all the problems and threats on the computer.

4 It searches for presence of harmful programs, plug-ins, add-ons, or any data including Junk files that were found malicious and linked to BUTLDSK.SYS. You need to Fix All to tackle all items detected by this tool.

Note:We recommend you to keep RegcurePro on the computer and check the status of your PC periodically to keep away from malware and virus.

Another Method to Remove BUTLDSK.SYS from Windows PC.

(If you are a computer expert, congratulations and you have another options here. If you are not an expert, please stop here because you will take a risk losing all the important files of the computer and endangering the whole system. )

Step 1 Remove BUTLDSK.SYS from your browsers

(guides for Chrome, Firefox, IE, Edge, you need to find out all the BUTLDSK.SYS extensions and remove them. ).

Google Chrome

Run the Google Chrome and find the “Menu” button in the upper right corner. Select”More tools“<<“Extensions

When all extensions in front of you, choose the malicious one and click the “trash can icon”.

Mozilla Firefox

Run the Mozilla Firefox and find the “Menu” button in the upper right corner. Select”Add-ons“<<“Extensions” or “Add-ons manage

When all extensions in front of you, choose the malicious one and click the Disable or Remove button.

Internet Explorer

Run the Internet Explorer and find the “Menu” button in the upper right corner. Select”manage Add-ons


When all extensions in front of you, choose the malicious one and click the Disable or Remove button.

Microsoft Edge

Note: Edge browser doesn’t support extensions now. As a Microsoft Edge users, you can skip this step and turn to step-2 directly .

Step 2 Uninstall all softwares related to BUTLDSK.SYS from Windows PC.

(Guides for all kinds of Windows PC system)

1 Press “Windows + R” keys on your keyboard to open Run window;

2 Put in appwiz.cpl and press OK button to view the programs list in Control Panel;

3 Select all suspicious software you want to remove and click Uninstall.

Step 3 Delete all softwares related to BUTLDSK.SYS from Registry.

1 Press “Windows + R” keys on your keyboard to open Run window;

2 Put in “Regedit ” and press ok;

3 locate and delete all malicious files related to BUTLDSK.SYS.

4 If you canno find out the files through this way, please manually locate these entries:

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\virus name
HKEY_CURRENT_USER\Software\Microsoft\Windows NT\CurrentVersion\Winlogon “Shell” = “%AppData%\.exe”
HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run ‘Random’

Note! you should be careful to tackle the problems on the entries or you will endanger the whole system and cause error. If you are not confident that you can do it on your own, please turn the first method.

Chapter 2 Remove BUTLDSK.SYS from Mac OS.

Step 1 Locate and remove BUTLDSK.SYS with MacKeeper

1 Click the links here to download MacKeeper Now.

2 start the installation by clicking “MacKeeper.dmg”. Click Continue to enter the process.

3 Click Internet Security to get safe browsing and antivirus tools to delete BUTLDSK.SYS related infetcions.

4 In “System Status” tab, run a Scan to detect the virus and malware. Then click “Fix items Safely” to clean up all virus and malware:

5 Chooce “Find & Fix” in the left column and carry out a complete scan to detect all junks After that, click “Fix items safely” button. (after remove BUTLDSK.SYS, you could clean your Mac periodically with this steps).

Step 2 Regular clean and protect Mac OS with MacBooster

1. Click the Download Nowbutton below to download MacBooster, and run the file to completely the installation.

2 Once installed, click the System Status tab and click “Scan” to diagnose your Mac.

3 click “Fix” button to solve all detected problems.

4 You can also navigate to “Malware Scan” tab directly and scan and remove all the virus related infections)

5 “Privacy Clean” will help you to remove all the cookies or threats endangering your information privacy.

6 If you can choose the Uninstaller tab to find and uninstall suspicious and unwanted apps.

Note:We recommend you to keep MacBooster on the computer and check the status of your PC periodically to keep away from malware and virus.

Another Method to Remove BUTLDSK.SYS from Mac OS.

(If you are a computer expert, congratulations and you have another options here. If you are not an expert, please stop here because this method may cause unsucessful uninstallation or system error as it requires you to identify all related apps and delete them.)

1 Press “Command+Option+ESC” together to open Force Quit Ap-plication Window.

2 choose Terminal and click Force Quit

3 Remove Apps related to BUTLDSK.SYS from Mac OS. (you need to identify all related apps and remove them or BUTLDSK.SYS will be installed again with this apps.)

Open Finder, and then find Applications Tab in the left column. Choose the malicious Apps and select “move to Trash

5 Reset Your Safari Web browsers. Open the safari and choose the menu. Click the “Reset Safari ” << “Reset

6 Press “Command + Shift + G” and type ” ~/Library ” to remove all malcious files from Library.

Friendly Reminder! If you want to keep a clean PC or Mac OS, please have a good customs when you are browsing, working online or playing games. The virus, malware, threats always get onto the computer or mac with malicious links on unknown websites or spam emails. So please take care of each click.

If you want to have a free hand online and hope to relax yourself, do not hestitate keeping the anti-virus tools on the system and optimize the system performance regularly. Have a good time online!