A client called us talking about a computer we worked on previously. It was nothing special the client was leaving a company and wanted us to move her personal files to another computer and remove them from the company computer so it could be returned fresh. We copied her files and returned the computer to bare drive+operating system status.
Today we get a call from her saying that according to the company we had destroyed the computer by reinstalling the operating system and that they would have to buy a new one to replace it and wanted to charge her for it as well as the volume licenses for the Microsoft office suite. What actually seems to have happened is that they either lost the keys or pirated all their office software and wanted a scapegoat, saying that she had 'stolen' all the company software.
After hearing the company's description of the system when they got it back I informed her that we returned it to factory settings and that the computer was fully functional, and that most companies we work with prefer returned systems in that state so that the software is easily reinstalled and reconfigured for a new user. I informed my boss about it and he wrote one hell of a email both criticizing the company's IT department for pretty much not doing their jobs and not keeping track of their software licenses, removed all the blame from her, and offered our services as a managed services provider to them. She forwarded it to her company. It was glorious.
I had almost forgotten why I loved working with this guy.