iphone unknown error 4000 – Office, Outlook, Windows Update (Solved)

  error codes

How To Resolve iphone unknown error 4000:

Let it be iphone unknown error 4000 or a query regarding Windows or Windows based software programs, we intend to support you with the best possible solution. You may either adhere to the sophisticated techniques at your own risk or allow a tech to remotely perform it on your behalf, no fuss. We make sure you are delighted by the solutions provided.

This short article explains methods to solve iphone unknown error 4000. Adhere to the techniques specified down below to solve the problem. The erorr usually occurs while installing, updating, or while opening the particular application.

Take a note of this page in your system, so that you could revisit this site again if system restart is required.

iphone unknown error 4000 Supported Operating Systems:

iphone unknown error 4000 error messages can occur 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 iphone unknown error 4000 Overview:
Error Name: iphone unknown error 4000

Error Type: Medium

Resolution Time: ~54 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 “iphone unknown error 4000

System Performance results in being slow/sluggish.

System hangs occasionally.

Root cause of iphone unknown error 4000iphone unknown error 4000:

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

iphone unknown error 4000 may be triggered because of various factors, you should identify the actual error for permanent resolution.


The steps given below should be implemented under guidance of a Technical Expert. If you want any assistance while following the steps, you can contact our 24×7 Technical Support.

How to Fix iphone unknown error 4000 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 most recent 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: Clear Junk Files

1) Press Win + R

2) Type “Cleanmgr” and Press Enter.

3) Pick the OS Partition and Press ok.

4) Click on Clean up System Files

In most cases iphone unknown error 4000 error must be resolved right now, if however the problem still persists please, get your system checked by an expert.

iphone unknown error 4000 Other Applications:

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

Our solutions include:

Consulting for:

  • Home based PCs.
  • Small Business
  • Enterprise

And we support your requirements for:

  • Software
  • Hardware
  • Technical Support
  • Application Support
  • Application Purchase

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

Related Error Codes: