Answer:
There are quite many actually, have a look at:
http://www.coolfunnyjokes.com/Funny-Jokes/Computer-Jokes
Also, I know a great one:
In a black, black town, In a black, black street is a black,black house and in it there is a black, black room and in the middle sits a black, black man and says : Never will I refill cartridges! (Not muchIT more Printer ;))