3. "Isn't it time for my computer to be upgraded?"
The nonspecific upgrade is the magic elixir of the business world: Users may not know what it is they want upgraded or what exactly they expect said upgrade to do, but gosh darn it, they just know it'll make all their woes go away. And hey, why ask a manager -- you know, the one with the power to actually place such an order -- when they can just pester the person who does the dirty work?
Come on already: Don't you have some extra RAM lying around for their hard drives -- or maybe a few extra gigawatts for their CPUs?