Hi guys, I am very new to this forum yet still hope to receive your help. I want to download apps and games to my computer, actually apk files. But many times when I finished downloading and open it, there was a notice "This file may cause harm to you computer", or sometimes when I ran the games, there are so many pop-up advertisements. Do you know any trustworthy source where I can download these file without bumping into these problems? Thanks so much!