I can't start iTunes
iPhone 5s, iOS 10
The general troubleshooting advice when iTunes fails to install properly (and reinstalling or repairing it does not work) is to remove not only iTunes but ALL related components, reboot, remove the target installation folders and reinstall. See turingtest2's excellent iTunes for Windows Trouble shooting Guide at:
Troubleshooting issues with iTunes for Windows updates
for instructions on how to do this in the Removing and reinstalling iTunes and other software components section.
There are lots of other tips there, as well. And you can even download iTunes from the iTunes installers section.
I can't start iTunes