well i think you said that is a work computer (unless i'm going spastic) which i would be correct in assuming it was a prebuilt?
i had the same problem with my laptop after fresh install of windows. so what i did was just google the type of computer i had.
E.G my lappytoppy was an acer travelmate 240.
so i googled "Acer TravelMate 240 drivers" and that took me to the acer website where i looked through the drivers and selected the ones i think i needed. it was missing a vga one so i looked for a vga driver and downloaded, and that did the trick.
so hopefully you can have the same luck as i did!