Our computer diagnostic for example, is the most complete in the industry. We thoroughly check your hardware including memory and hard drive (two of the most common cause of failures). Keeping your system running cool is a must and we physically clean the internal system and fans from dust. We painstakingly remove nasty software which has planted itself onto your system. We scan your complete operating system and data for viruses and malware. Your system is so clean when we get done, you can eat off of it (though we wouldn't recommend it).