Cannot Start iTunes after update

Hi all,
I recently tried to update iTunes to version 10.5.2- I uninstalled the old version (10.5) and downloaded and installed the newest version. However after installing iTunes 10.5.2, when I tried to run it I get the following error:
"iTunes helper was not installed correctly. Please reinstall iTunes. Error 7"
followed by:
"iTunes was not installed correctly. Please reinstall iTunes. Error 7 (Windows Error 126)."
I Googled the error and found some suggestions to repair Apple Application support from the Programs and Features Control Panel, and to re-install the .NET Framework 4.0. After doing that I no longer get the first error but I now get this: "The program can't start because icuin36.dll is missing from your computer. Try reinstalling the program to fix this problem."
I also still get the second error.
EDIT: I am on Windows 7 x64.

Hmm! I wonder if there are windows system file corruption that prevent you from completing the install.
Can you go to command prompt (START/ALL PROGRAMS/ACCESSORIES right mouse click "command prompt" and choose "Run as Administrator"
type in
sfc /scannow
let Windows fix any system files that need to be repaired.
Restart the computer if it did actually repair any files.
Then do the install.
Good luck.

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you can't install XP on new 2011 Macs.
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Apple Support: Removing and reinstalling iTunes and other software components for Windows Vista, Windows 7, or Windows 8
http://support.apple.com/kb/HT1923
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http://support.apple.com/kb/HT1926
Regards,
- Brenden

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Cannot Start iTunes after update

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