Timing Commander - Installation Error: 0x80070643 or 0x643

Description: Error codes “0x80070643” or “0x643” occur when you install the .NET Framework updates.

Cause: This issue may occur if the MSI software update registration has become corrupted, or if the .NET Framework installation on the computer has become corrupted.

Fix: See Microsoft support: http://support.microsoft.com/kb/976982