However, when you upgrade to Windows 10, you will find so many unsolved issues which are creating bugs for users. Windows 10 has been available since the end of July. I just did a fresh install and now its giving me an error that says an error occurred during the installation of assembly ‘ …… anybody experience this and knows a fix?” “Just recently updated to windows 10 and itunes worked fine. (Solved) I Cannot Install iTunes on Windows 10