How to Fix Error Codes “0x643 or 1603” Received on Updating Windows

Solution summary

If you are looking for the complete solution to resolve error codes “0x643” and “1603”, which you get while updating Windows®, then follow the easy 5-step resolution and the error codes will get resolved on your computer.

These error codes mean that the update has not been installed properly. These errors occur due to corrupt .Net Frame entries.

Each step is accompanied by an indicative screenshot for the ease of mirroring the action.

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Step 4

Choose and Remove ”.Net Frame” Entries::
Choose all the ”.Net Frame” entries and then click ”Remove”.

Step 5

When all the files have been removed, restart the computer.

Note: If you want to download and install the latest .Net Frame 3.5 version, go to the following link:

Once the .Net Frame 3.5 version is installed, restart your computer.

You have successfully removed the corrupted .Net Frame files from your system and you will no longer receive the error codes while updating Windows®.

If you face any problem related to your computer, operating system, software applications, or peripheral devices such as printers, MP3 players, digital cameras, etc, then call iYogi and we”ll fix it.