** Click this link for my page of Zune fixes & tips I've collected over the years **

ZunePrep v2 is a program for Windows XP (compiled batch file) which automates the steps necessary to correct the 0x80070643 error during Zune installation. In most cases where the software fails to install with this error it is due to your user environment and OS not being in the expected state. This version of ZunePrep is for Windows XP only and corrects situations as seen in the error message below:

Installation Failed Setup must stop because the required package 'Zune' failed to install. Operation 'InstallDriver' has finished with result 0x80070643 Operation 'RemoveDriver' has finished with result 0x80004005 DIFXAPP: Rollback failed with error 0x2 Error Code: 0x80070643

ZunePrep will put your user environment into the proper state for installation of Zune by resetting some registry key permissions, re-registering some system dlls and removing WDF related files that interfere with the proper installation of the Zune software - that is all ZunePrep does.

Make sure your Windows Firewall (control panel, Windows Firewall) is turned ON
For optimal results, you must have the latest Windows Updates installed.

Be sure you check out the Official Microsoft KB article for 0x8007643 too!
If nothing else seems to work, ZunePrep will probably help.

By downloading & using this program,
you agree to do so at your own risk.

*** VISTA USERS - 0x80070643 Probable Solution ***

If you are running Windows Vista and you are getting the 0x80070643 error when attempting to install the Zune software, it is very likely that your WINDOWS FIREWALL is turned off or disabled.
For specific help on enabling the Vista firewall, check out this Microsoft Knowledgebase article.

** Click this link for my page of Zune fixes & tips I've collected over the years **

Current Version of ZunePrep v2.6.4.3 1.25.08