>> Client : “Will this USB drive be compatible with my 4 year old Dell computer?”<p>I worked years ago, with a company providing IT services. I have learnt after months of dealing with the client, that "Yes" and "No" are the best answers.<p>If the drive didn't work, you can simply justify it that something went missing on Windows, or the drive didn't install correctly. It's easy for the non-tech savvy users to understand "Yes", "No", "Windows badly installed", rather than to open long discussion where the client comes up to me with all his hardware and start asking if this work and this doesn't.<p>Telling the client "It should" is not professional; tell them "Yes" and if it doesn't work and you fail to solve the problem, you can simply say that the operating system is badly installed (None can prove it's well installed). However, when you say "it should", the non-tech savvy client will become savvy and will try to use his 3 words knowledge to install the device and will give propositions, ideas... that are generally stupid and useless. This will make him feel that he's as tech-savvy as you.