windows update code 645 – Office, Outlook, Windows Update (Fixed)

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How To Resolve windows update code 645:

Let it be windows update code 645 or a query regarding Windows or Windows based apps, we intend to assist you with the best possible solution. You can either follow the advanced methods at your own risk or allow a tech to remotely perform it for you, hassle free. We make sure you are happy about the solutions provided.

This post explains the best way to repair windows update code 645. Adhere to the methods given below in order to resolve the issue. The erorr normally appears while installing, updating, or while opening the particular app.

Take a note of this article on your system, allowing you to revisit this website again if system restart is required.

windows update code 645 Supported Operating Systems:

windows update code 645 error messages may occur in most of the following Microsoft Windows operating systems:

  • Microsoft Windows 10
  • Microsoft Windows 8.1
  • Microsoft Windows 8
  • Microsoft Windows 7

Microsoft Office Suites:

  • Microsoft Office 365
  • Microsoft Office 2016
  • Microsoft Office 2013
  • Microsoft Office 2010
  • Microsoft Office 2007

And others..

Short of windows update code 645 Overview:
Error Name: windows update code 645

Error Type: Medium

Resolution Time: ~58 minutes

Data Loss: Potentially

Scope of Error: Application Level

Software: Microsoft office 2016, 2013, 365, 2010 and others

Developer: Microsoft Corporation

Views Today: 1125

KB ID: 37979

Symptom of Error: Error message pops up “windows update code 645

System Performance results in being slow/sluggish.

System hangs from time to time.

Reason for windows update code 645windows update code 645:

  • Internal system conflict.
  • Corrupt software installation.
  • Virus or malware infection.

windows update code 645 may be caused caused by various factors, it is important to identify the actual error for permanent resolution.


The steps given down below need to be used under oversight of a Technical Expert. If you need any assistance while following the steps, you can contact our 24×7 Technical Support.

How to Fix windows update code 645 Guide:

Step 1: Check System for Corruption:

Perform System Scan

1) Press Windows + R

2) Type cmd and Press Enter.

3) Type “sfc/scannow” and press enter.

Note: You will need Admin privilege to run the sfc command.

Step 2: Update to current Windows KB

1) To check for Windows Updates (Windows XP, Vista, 7, 8, and 10):

2) Click the Start button.

3) Type “update” into the search box and hit ENTER.

4) The Windows Update dialog box will appear.

5) If updates are available, click the Install Updates button.

Step 3: Cleanup Junk Files

1) Press Win + R

2) Type “Cleanmgr” and Press Enter.

3) Select the OS Partition and Press ok.

4) Click on Clean up System Files

In most cases windows update code 645 error must be resolved now, if however the problem still persists please, get your system checked by an expert.

windows update code 645 Other Applications:

We support any applications based on Windows to analyze the requirements to meet your satisfaction.

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Consulting for:

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Our certified experts could also help you cover your computer’s performance based on annual, semi-annual, monthly or on-demand services.

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