Internal Error Of the Launcher?

88 Undead Priest
I have been having problems with the downloader having an internal Error. this may help you.

If you are currently testing the 64-bit client, in order to patch up to 4.3.4 you will need to remove the 64-bit files to allow the patching process to complete.

With the 64-bit client files in place you will receive the error: Blizzard Updater failed with an internal error.

Simply delete the 64-bit files listed below from the World of Warcraft folder, and the patching process will resume after going through a short repair process.


World of

A new version of the 64-bit client files will be available for 4.3.4 after the patch is live. Please keep an eye on the 64-bit client forum thread for updated files. <3 Kalisto
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36 Night Elf Druid
Thanks for the post. This did resolve my issue, but unfortunately the Launcher has detected data corruption and is now repairing. I would have liked to have known prior to patching that I needed to remove the 64-bit client files to avoid this problem. Ideally, I would like to be able to patch without needing to remove the 64-bit client files at all.

At least this issue is now resolved for me. Thank you.
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88 Undead Priest
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85 Blood Elf Mage
im having the same problem ,and i deleted the file, and it still wont let me use the launcher?
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90 Human Paladin
08/29/2012 02:24 PMPosted by Byaw
im having the same problem ,and i deleted the file, and it still wont let me use the launcher?

yah me too
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90 Night Elf Druid
I never tried the 64 bit client but it still wont let me use the launcher
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