You may receive error message
0x80070643 when windows update, unistall Zune software, install
Microsoft Essentials..., this page contains some useful information
to repair your
computer error code 0x80070643, if you fixed this
error from this help article, you can email us
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try to install .NET Framework updates on your windows xp
sysytem, you may get the error below:
"error code 0x80070643"
You must fix MSI software update registration
corruption issues or uninstall multiple versions of the .NET
Framework by using the .NET Framework Cleanup Tool, and
then reinstall those components.
Method 1: Fix MSI software update registration
To fix MSI software update registration corruption
issues automatically, click the
Fix it link. Click Run
in the File Downloaddialog box, and then follow the
steps in the Fix it wizard.
Note this wizard may be in English only; however, the
automatic fix also works for other language versions of
Note if you are not on the computer that has the
problem, save the Fix it solution to a flash drive or a
CD and then run it on the computer that has the problem.
How to fix MSI software update registration corruption issues
Visit Windows Update, and attempt to install updates
again. If the issue is not resolved, go to method 2.
Method 2: Repair the .NET Framework
To repair the .NET Framework you must uninstall multiple
versions of the .NET Framework by using the .NET
Framework Cleanup Tool, and then reinstall the
1. Download the .NET Framework Cleanup Tool:
.NET Framework Cleanup Tool User's Guide
2. Using the .NET Framework Cleanup Tool, uninstall the
.NET Framework 1.0, 1.1, 2.0, 3.0, and 3.5.
Note The cleanup tool does not let you remove the .NET
Framework 2.0 in Windows Vista or later versions because
the .NET Framework is installed as an operating system
3. Restart the computer.
4. Download and install the following components:
.Net Framework 1.1:
Microsoft .NET Framework Version 1.1 Redistributable Package
.Net Framework 1.1 SP1:
Microsoft .NET Framework 1.1 Service Pack 1
.NET Framework 3.5 SP1 (this will also install .Net
Framework 2.0 SP2 and .Net Framework 3.0 SP2)
Microsoft .NET Framework 3.5 Service Pack 1
5. Restart the computer
6. Visit Windows Update, and then check for and install
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