Hello Stanislav,
We apologize for the inconvenience caused. Please follow the instructions from the article in order to fix the AVG PC Tuneup program in your PC. Here is the link: http://support.avg.com/SupportArticleView?urlname=Update-AVG-PC-TuneUp-to-the-latest-version
Thank you.
My TuneUp does not work any more on new version of Win 10 (1703).
Issue resolved (https://support.avg.com/answers?id=906b0000000DjHMAA0).
AVG Guru