Has Apple Pulled the 64-bit iTunes for Win 10 v12.12.0.6 Installer (rel. 20-Sep-2020)?
According to the Apple Security Updates page at https://support.apple.com/en-ca/HT201222 iTunes v12.12.0 was released for Windows 10 on 20-Sep-2021. I currently have 64-bit iTunes for Win 10 v12.11.4.15 (the installed version, not the Microsoft Store UWP version) and when I go to Help | Check for Updates it says that v12.11.4 is the current version.
I tried to perform an over-the-top update using full offline installers (iTunes64Setup.exe, ~ 200 MB) downloaded yesterday (22-Sep-2021) from either Apple.com at https://www.apple.com/itunes/ or MajorGeeks.com at https://m.majorgeeks.com/files/details/itunes.html but both installers asked if I want to repair or remove my current iTunes installation instead of performing an over-the-top update to v12.12.0.6.
I checked the file properties of the iTunes64Setup.exe files I downloaded yesterday from both Apple and MajorGeeks and was surprised to see that I actually downloaded the previous v12.11.4.15 installer and not a newer v12.12.0.6 installer (as it is labelled on MajorGeeks), which explains why my over-the-top upgrade didn't run to completion as expected.
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64-bit Win 10 Pro v21H1 build 19043.1237 * Firefox v92.0.0 * Microsoft Defender v4.18.2108.7 * MB Premium v4.4.6.132-1.0.1453 * 64-bit iTunes for Win 10 v12.11.4.15
Dell Inspiron 15 5584, Intel i5-8265U CPU, 8 GB RAM, Toshiba KBG40ZNS256G 256 GB NVMe SSD, Intel UHD Graphics 620