Personally, I hate Best Buy. They are an awful company to work for, and tools are limited to what you can legally get clearance to use. Spybot and Malware Bytes are not for commercial use… it’s hard to enforce if you are a small company, but a place like Best Buy can’t exactly hide from the spotlight.
Their prices are a joke and so are a lot of the people they hire as technicians. The software that they use is actually extremely well designed. Everything is in a PE environment, it loads the registry hives and automates most of the clean-up process (including updating definitions before scanning).