Do you want to remove all your recent searches? All recent searches will be deleted. The Microsoft Windows Malicious Software Removal Tool checks Windows Vista, WIndows 7, Windows XP, Windows 2000, and Windows Server 2003 computers for and helps remove infections by specific, prevalent malicious software including Blaster, Sasser, and Mydoom.When the detection and removal process is complete, the tool displays a report describing the outcome, including which, if any, malicious. With the Microsoft malware removal tool, Microsoft can quickly remove prevalent strains of malware from a large number of computers at once, slowing the spread of particularly virulent malware.

Hi Ben,

Welcome to Microsoft Community Forums.

From the description, you are facing issue installing The Microsoft Windows Malicious Software Removal Tool software.

To assist you better I would appreciate if you could answer the following questions:

1)Have you made any changes to the hardware or software to your computer prior to the issue?

2)Do you get any error message / code?

Follow the steps and check,

Method 1: Disable third-party Security Software

a)On your Computer screen Task Bar next to System Clock..

b)You will see the third-party Security Software Icon.

c)Click on the third-party Security Software Icon, you will see a pop up.

Run Malicious Software Removal Tool Manually

d)In that pop and select the option to disable, click on it.

Windows Malicious Software Removal Tool Run

Now the third-party Security Software will be disabled.

Important Note: Antivirus software can help protect your computer against viruses and other security threats. In most cases, you shouldn't disable your antivirus software. If you have to temporarily disable it to install other software, you should re-enable it as soon as you're done. If you're connected to the Internet or a network while your antivirus software is disabled, your computer is vulnerable to attacks.

Method 2: Run the System Update Readiness Tool,

a)Swipe in from the right edge of the screen, and then tap Search. (If you're using a mouse, point to the upper-right corner of the screen, move the mouse pointer down, and then click Search.)

b)Type command prompt in the search box.

c)In the list of results, swipe down on or right-click Command Prompt, and then tap or click Run as administrator.

d)In the Administrator: Command Prompt window, type the following commands exactly as they appear. Press the Enter key after each command:

DISM.exe /Online /Cleanup-image /Scanhealth

DISM.exe /Online /Cleanup-image /Restorehealth

e)To close the Administrator: Command prompt window, type Exit, and then press Enter.

f)Run Windows Update again.

Method 3: The Microsoft Windows Malicious Software Removal Tool

“Microsoft® Windows® Malicious Software Removal Tool (KB890830)”

Check if you are able to install it now, if not follow the next method.

Does Microsoft Malicious Removal Tool Work

Method 4: Try installing the software in Safe mode with networking and check,

Boot the computer in Safe mode with Networking and check if the issue persists. Follow these steps to start the computer in safe mode.

Click the link and follow the steps “Windows Startup Settings (including safe mode)”

Refer the link,

Microsoft

“The Microsoft Windows Malicious Software Removal Tool helps remove specific, prevalent malicious software from computers that are running

supported versions of Windows”

Malicious Software Removal Tool

This information should help. If you need further assistance regarding Windows, please post. We will be happy to help you.