I am using window 7. I had been using the karaoke maker for a few months and made more than a hundred karaoke songs already. I am very happy with the software. Thank you.

But now, I have a problem. Ever since I had the window update, the maker began to have problems. I cannot import audio & video. Every time when I click the import button, it will open a window telling either "Error of recording" or "There is no audio track". In such a way that I cannot continue on the project. Please help. Thank you.

Thanks for your kind feedback.
Regarding your problem, please make sure that:
1 - Microsoft .NET Framework properly installed on your computer
2 - Codec pack is updated