New itunes 12.1.0.71 installed, and won't open. It gives me two errors.

Question

I use a Microsoft Vista.
When the Apple Software Update, ask me to download the new itunes version, i did it. After installing the new Itunes 12.1.0.71, i try to open the programm (itunes) and it gives me this two windows, one that says, "This app has failed to start because MSVCR100.dll was not found. Re-installing the application may fix this problem.", and immediately after i click OK, it gives me a second window that says, "Itunes helper was not installed correctly. Please reinstall Itunes. Error 7 (windows erros 193)."
I try re-installing itunes, and it did not work.
I try to delete every programm related to apple, and it did not work.
I deleted the new itunes version, and downloaded again, it did not work.
So, please, if anyone can help me with this issue, i really appreciated.

Answer 1

For general advice see Troubleshooting issues with iTunes for Windows updates.
The steps in the second box are a guide to removing everything related to iTunes and then rebuilding it which is often a good starting point unless the symptoms indicate a more specific approach. Review the other boxes and the list of support documents further down the page in case one of them applies.
Your library should be unaffected by these steps but there is backup and recovery advice elsewhere in the user tip.
If the advice above doesn't resolve things you could try this alternate version:
iTunes 12.1.0.71 for Windows (64-bit - for older video cards) - itunes64setup.exe (2015-01-28)
which is a 64-bit installer for the 32-bit version of the core application, similar to previous 64-bit releases.
Or roll back to the previous build:
iTunes 12.0.1.26 for Windows (32-bit) - iTunesSetup.exe (2014-10-16)
iTunes 12.0.1.26 for Windows (64-bit) - iTunes64Setup.exe (2014-10-16)
tt2