If you are having issues with iTunes on windows, you can uninstall it , then download an up to date iTunes install from Apple and install it.
Go to your control panel in windows , go to programs , select iTunes , then right click , uninstall , then reboot.
After the reboot download go to Apple and download a new copy of iTunes
Your iTunes data will still be there and will load when you start iTunes.
Don’t forget to log in to your iTunes account and authorize that computer.
You can also choose to install Quicktime separately from iTunes which can help with issues with Windows in iTunes.