My AppData folder is growing all time and now it is about 15 Gb. Can I delete part of this Folder? And how select what I can delete without problem for my PC

You cannot delete anything from that folder without causing problems. Review the size of the sub-folders to determine which application is causing the growth. I would suspect a Media Related application. Movies, video clips. Delete items from the applications libraries or playlists instead.

Applications store their files and settings in subfolders under AppData. You may use WinDirStat of similar tools to see which folder or subfolder is occupying most of the hard disk space, and decide accordingly before proceeding to delete folders in random. WinDirStat: http://windirstat.info/ Ramesh Srinivasan | The Winhelponline Blog Microsoft MVP, Windows Desktop Experience