Issue: Unable to install Windows Update.

Windows Update Failed

Environment: Windows 7 x64

Resolution: Windows Update can fail due to multiple reason. In this particular scenario, we noticed that the core services required to run Windows Update were missing.

The missing services were BITS & Windows updates. Both the services are required to run the updates. Without these services, you’ll be Unable to install Windows Update.

Note: Please backup the Registry before you make any changes. To know more on how to back up the registry, click here.

Steps to fix the Windows Update problem:

  • Once you have validated that the two services are missing. Download the following registry keys:
  • BITS Registry Key
  • Windows Updates Registry Key
  • Reboot the PC.
  • Now, you should be able to check for the windows updates successfully and install them.


For your reference, I’ve provided an abstract for these services from Wikipedia. For further information about the service, kindly continue to the Wikipedia link shared below.

Background Intelligent Transfer Service (BITS): Background Intelligent Transfer Service (BITS) is a component of Microsoft WindowsXP and later operating systems that facilitates prioritized, throttled, and asynchronous transfer of files between machines using idle network bandwidth. It is most commonly used by recent versions of Windows Update, Microsoft Update, Windows Server Update Services, and Systems Management Server to deliver software updates to clients, Microsoft‘s anti-virus scanner Microsoft Security Essentials (later merged to and renamed to Windows Defender) to fetch signature updates, and is also used by Microsoft’s instant messaging products to transfer files. BITS is exposed through Component Object Model (COM), making it possible to use with virtually any programming language.

For more info about BITS, click here.

Windows Updates: Windows Update, a service offered by Microsoft, provides updates for the Microsoft Windowsoperating system and its installed components, including Internet Explorer. An optional feature disables access to Windows Update and replaces it with access to Microsoft Update, an expanded version of the service which provides updates not just for the operating system and Internet Explorer, but also for other Microsoft software running under Windows, such as Microsoft Office, Windows Live applications, and Microsoft Expression Studio. Windows Update clients normally download patches over an Internet connection, although Microsoft makes provision for installing updates on computers without an Internet connection.

For more info about Windows Updates, click here.

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Passionate for Latest Gadgets, a Computer geek by Hobby, and luckily Profession too. Started my career in 2005 with IBM, worked with Microsoft later. Back in 2009, started Pledge Technologies ( (parent company to Grishbi). We, at Pledge Technologies, provide IT Consulting to SMBs across US & UK. Specialized in Microsoft Technologies like AD, Exchange, etc., and lot of experience of Office 365 Migration for various clients. Grishbi is a platform where we express what we learned today, and share it with world.