Apple has released a Windows-only iTunes update, bringing the software to version 12.1.1. The update primarily fixes a list of bugs, including audio playback issues and Outlook syncing problems. Improved compatibility with screen readers is another change touted in the release notes.
Windows and Mac users received the 12.1 update three weeks ago, which added a Notification Center widget for OS X Yosemite. Apple has not updated iTunes for OS X since then. When it comes to iTunes 12, the jump from 11 brought significant changes to Apple's flagship entertainment package.