Question : Problem: I am unable to reinstall Apple iTunes on my PC.

HP Pavillion Laptop dv6408nr; Windows here was a problem with the windows installer package. A program required for this install to complete could not be run. Contact your support personnel or package vendor.
HP chat help recommended uninstalling iTunes and reinstalling. Does not work, Uninstall complete reinstall now not possible. Same error message.
Apples Genius desk at store said to try Microsoft help. They suggested downloading Windows installer Cleanup Utility Package http://download.microsoft.com.download/e/9/d/e9d80355-7ab4-45b8-80e8-983a48d5e1bd/msicuu2.exe
This was done, with no apparent difference made.
Everything else seems to work fine. How can I get my itunes back?

Answer : Problem: I am unable to reinstall Apple iTunes on my PC.

Reboot safe mode as administrator, uninstall package, go to directory and delete files that are left in program files.  Then restart computer and install again. This should be sufficient to install again your software.