I never had problems with iTunes before installing the Windows internet explorer 8. Afterwards, several problems have appeared, and as far as iTunes is concerned I need to reinstall iTunes every time my computer is booted up. The shortcut on my desktop starts the installation program and not iTunes itself. Since iTunes.msi cannot be found on my computer, I have to go to the iTunes download side and install it again. I think Internet Explorer 8 is the culpritt. Did anyone solve this problem ?
It seems that the link on the desktop is wrong and points to the installer instead of the iTunes.exe program in "program files". Go to program files\iTunes.exe, select it and make a new shortcut on the desktop. That new shortcut will work normally.