iTunes 8.1.1 Released; Fails to Install: Fix
A number of users have experienced problems updating to the newly released iTunes 8.1.1. Generally, when this issue occurs, installation appears to proceed normally but then delivers the error message “The installer encounted errors before iTunes could be configured. Your system has not been modified. To retry these operations at a later time please return to the installer again. Click Finish to exit installer.”
Fix
This problem can often be fixed by reinstalling the latest version of QuickTime via the following steps:
- Download the latest edition of QuickTime for Windows (make sure to pick the option without iTunes)
- Choose to save the file to your disk, then double-click the .exe file and install QuickTime
- After QuickTime is successfully installed, download iTunes again, choosing to save the file. Double-click the iTunes installer .exe and proceed with installation.
Other potential fixes for this issue include:
Run a disk check Disk errors, particularly in Windows XP, can prevent proper iTunes installation. See this Microsoft Knowledge Base article for instructions on performing a disk check/repair.
Use Windows Installer Cleanup Use the Windows Installer Cleanup tool to remove any references to Apple-related installation files (QuickTime, iTunes, etc.), then re-try using the aforementioned two-step method to reinstall QuickTime and iTunes.
Feedback? info@windowsfixup.com.
Filed under News, Windows 7, Windows Vista, Windows XP, iTunes by on Apr 8th, 2009. Comment. 
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Pings on iTunes 8.1.1 Released; Fails to Install: Fix
Comments on iTunes 8.1.1 Released; Fails to Install: Fix
Works! Friggin’ rock. This fixes this issue with all 8.x versions of iTunes.
I used the windows installed clean up and it worked perfectly. Thank you!!!!! I was about to lose my mind.
Ugh, what happens if the clean up won’t instal because of a sudden error?
What’s up with all these stupid errors??
Question of the millenium “If a new version of a program needs the old version removed, why on earth can’t the programmers write the removal into the new program?” Most people just want to have fun with computers, I have enough aggravation already in my life.
i keep having problems when i try to install itunes, it installs fine up until it starts installing quicktime. when it says computing space requirements, it always freezes and says could not find %appdata% or something like that and it is making me mad, i’ve tried uninstalling itunes and reinstalling it but it didn’t work. I cant even download the windows installer cleanup and it says could not find %appdata% error 1606. please help!