What is the meaning of Error Code 646?

What is the meaning of Error Code 646?

Microsoft KB is created to fix Error 646 that occurs during installation of MS Office updates.

It consists of an automated fix that will help you resolve your issue.

But first of all, please check your computer for any viruses or Malware using your antivirus such as Kaspersky or Bit Defender and ensure that your device is free from any threats.

You receive error code: 0x80070646, error code: 646, or error code: 1606 when you use Windows Update or Microsoft Update

What is the meaning of Error Code 646?

This update problem occurs when windows installer encounters an error.

Error code 646 are generated by windows installer.

When you encounter the errors that described in the “symptoms” section, the problem may be caused by an incorrect value registry.

To fix the problem do step by step as follows:

For Windows 7 and Vista users:

1. Click Start and then in the Start Search box type regedit.

2. In the programs list right click Regedit.exe then click Run as administrator. If you are prompted for an administrator password or for confirmation type the password or click Continue.

3. Locate and then click the following registry subkey:

HKEY_USERS.DEFAULTSoftwareMicrosoftWindowsCurrentVersionExplorerUser Shell Folders

4. In the details pane of Registry Editor, locate AppData.  The value of this key should be  %USERPROFILE%AppDataRoaming.

5. If the value is not set to %USERPROFILE%AppDataRoaming right click AppData in the details pane, and then click Modify.

6. Enter %USERPROFILE%AppDataRoaming in to the Value data box and then click OK.

7. Close Registry Editor.

8. Try to install the update again. If the problem persists, repeat the steps but use the following registry subkeys instead of the subkeys that is specified in step 3.

HKEY_CURRENT_USERSoftwareMicrosoftWindowsCurrent VersionExplorerUser Shell Folders

HKEY_LOCAL_MACGINE SoftwareMicrosoftWindowsCurrent VersionExplorerUser Shell Folders

  For Windows XP users:

1. Click Start and then click Run

2. In the open box, type regedit and then click OK.

3. In the programs list, click Regedit.exe. If you are prompted for an administrator password or for

confirmation, type the password or click Continue.

4. Locate and then click the following registry subkey:

HKEY_USERS.DEFAULTSoftwareMicrosoftWindowsCurrentVersionExplorerUser Shell Folders

5. In the details pane of Registry Editor, locate AppData.  The value of this key should be %USERPROFILE%Application Data.

6. If the value is not set to %USERPROFILE%Application Data, right click AppData in the details pane, and then click Modify.

7. Enter %USERPROFILE%Application data in to the Value data box and then click OK.

8. Close Registry Editor.

9. Try to install the update again. If the problem persists, repeat these steps but use the following registry subkeys instead of the subkeys that is specified in step 4.

HKEY_CURRENT_USERSoftwareMicrosoftWindowsCurrent VersionExplorerUser Shell Folders

HKEY_LOCAL_MACGINE SoftwareMicrosoftWindowsCurrent VersionExplorerUser Shell Folders

What is the meaning of Error Code 646?

Dear Johnnierbailey,

The meaning of error code 604 is "Does Not Exist Anywhere". Three number codes of Global failure responses codes- 6xx.

The error message has been shown when windows installer encountered with a wrong registry value. To fix this problem you need to download and save a KB called Microsoft fix it 50461.

At first, Download and save the fix it program. After that you need to close all open programs and browser. Then running the

MS fix it program.

If you want to fix this error without any fix it program. Then follow the steps which I given below:

For Windows 7 and windows vista users:

1. Press the Start Button, select Search box, and then type “regedit”.
2. It redirected you to the registry editor.

For Windows XP users:

1. Press Start Button, Select Run.., from the lower right portion of your start menu.
2. Then type “regedit”. It redirected you to the registry editor.

Let’s we fix the problem:

After opening the registry editor: HKEY_USERS>DEFAULT>Software>Microsoft>Windows>Explorer>User Shell Folder.

Click on the AppData and select modify and enter the correct value. The correct value is: [ %USERPROFILE%Application Data ].

Note: don't including the bracket.

Now click ok, close the registry editor and try to install MS office update again.

Hope that, it will be work perfectly.