Do you have the KB2901983 NET Framework 4.5.2 Update Problem too?

Then you know this message: .NET Framework 4.5.2 für Windows 7 (KB2901983) could not be installed (Fehlercode: 643)

The reason is, according to Microsoft a corrupted MSI software update registration.

Try the following steps:

• Download this Microsoft Fix (direct download expired, follow the link and go til step 3, so you can download the patch)
• close all programs
• install
• restart
• KB2901983 should now be installed easily

Good luck! ;-)

Greetings, Frank