Lately, my system was erratically freezing which impacted my work to a great extent. I consulted few of my friends to know what could be the main reason behind such type be of system behavior. They asked me look for Ninja TuneUp, a PC optimizer, and download same to do away with freezing issue. I did same and run the scanner. To my surprise there were so many hidden invalid registry files due to which this freezing thing was so much prominent. I’m quite satisfied with Ninja TuneUp and would like to recommend others to use it.