Game "blinks" frames [resolved]

[Sirpunchula]

Every time I try to run an AGS game in a window, my game "blinks", in that it freezes at a certain frame for a second, then rapidly blinks to the current frame and back to the first one. When I try to run the game in full screen mode, the game just freezes, and only shows the current frame when I minimize. When I restore the window, It freezes again.
 This problem hasn't always occurred; It started when I attempted to open an "rar" file containing an AGS game this morning with the wrong program, and has been going on since for every game I try to run.
 Is there some way I can fix this?

Edit: Rebooted my computer, it works now.