First, does your computer service cover a wide range of operating systems? Sure, everyone will be using Windows, but if you own an iPod, then you will need some Mac expertise. If your office is using Ubuntu, then you will need some Linux expertise. You will need a computer service that knows how to work with different operating systems because computers will work and will need maintenance for different components depending on the operating system they use.

Second, does your computer service cover a wide range of computer types? A laptop will function differently from a desktop computer, and this will be different from a netbook, which, in turn, will be different from a tablet or an iPad. There are many different computer types that need their own kinds of maintenance, and the last thing you want is someone pretending to know what they're doing while they tinker with your electronics. Make sure that your computer service office can also cover costs of faulty repairs and not charge you for more service, especially when the mistake is their fault.