Mr. B

Mr. B is the creator and owner of the ClassicSamVideos channel. He is the one who writes most of the errors for Microsoft Sam to react to in his Windows PCs. He also has an unnamed cousin, who presumably was a TTS video maker themself, because of how they had errors and signs for a canceled project.
== Physical Description ==
He currently does not have a physical form at this time.
== Personality ==
From the way he writes errors, he is a witty guy who is thinking of the jokes himself and/or grabbing from other sources. Sometimes, the events from everywhere else on the Internet affects the way he writes his errors, especially if he's out of ideas.
== History ==
Mr. B approaches Sam with the idea of starting a YouTube channel where Sam reacts to stuff. Sam agrees, but Mr. B has one condition. Sam's look had to be changed from being a stick figure to being a humanoid, and Microsoft Mike and Microsoft Mary's appearances are altered, too, but with less original designs since he did not anticipate them to be active characters in the series. However, there seems to be a slight glitch on Sam’s design, causing him, too, to turn into an Epic Face at certain points. 
On July 1st, 2023, the series officially begins. With his tools, Mr. B writes errors using an error generator made by Barra, and sends them directly to Sam’s computer. The computer has also been modified so that its design can be manipulated, and so it can downgrade or upgrade to other Operating Systems. But before then, Mr. B notices Dr. Zomboss approaching the house, and they both come up with a plan to defeat him. Usually, Mr. B's errors are not supposed to majorly contribute to the events themselves, but this is important. He and Sam make an error to trick Zomboss into thinking that Sam became a zombie due to the Zombie Virus. Mr. B even changed his look to a green color, and the error, too, for good measure. However, Microsoft Mike and Microsoft Mary became sacrifices in order to catch Zomboss off-guard, and many times after, the error series was almost put in jeopardy due to events relating to what Mr. Afterlife did a week before. But after July 4th, Sam ends up escaping to Windows Private Island and takes a break from the madness, before finally continuing again in September 23rd. It should be noted that Sam’s old computer there received the same changes from Mr. B, albeit without the OS switching. Earlier, Sam uses the Orb of Light to get a new computer, and just now, it receives the same changes that the other computers had, and it can switch OSs. At the end of this session, there is news that there are two new series coming to the channel, and that Mr. B's unnamed cousin has supplied them with errors and signs from a canceled project of theirs.
Sam decides to come up with the name for a series this time, calling it "10-Sign Quickie" because he wants this to be a quickie. The other new series is about Sam reading errors that other people have made in Barra's error generator, the same one that Mr. B uses to write them. But then, in Episode 2 of the Sign Quickie series, Sam accidentally revives Mr. Afterlife with a single word, thus causing the whole operation to be jeopardized again in October 5th when Sam gets banished to the Retcon Room. Luckily, there is a spare computer in there, which also received changes, and is used to read errors as usual, but it has only one OS. What’s interesting is that this time, there are error requests written by other people, and one guy even makes a fanmade intro for the series!
== Appearances ==
He has never appeared physically, although if you want to know how many times his errors have shown up, go to the Errors page, but note that some errors might not have been written by him. Mr. B will also not be listed as a character in an episode article if he has not written things himself.