For a company with many computers, having a computer support team on standby, ready at a moments notice to help with a problem is a must. Without this, all of the standard problems that you could expect within a network of computers is likely to cripple your entire operation, sometimes for days at a time. Having a tech and networking company on retainer will certainly provide you with some insurance in these situations, and will prove to be a invaluable tool in you belt. They will be much more dedicated towards you than you would expect from someone you just phone up for the first time when a problem arises. In addition to your expectations of aid in dire situations, they will also be there for simpler issues. This means that you will probably be able to get enough work out of them. By them working with you more often though, you could expect them to become more familiar with your network, the benefit of this being that they will be far more likely to recognise a problem and fix it faster than they would be able to otherwise.