If that same pages are OK on other work computers, it's a job for the IT guy to fix this. It's their work, not yours.
If no IT guy present, ask your boss for permission to spend a few days of your paid time to reinstall Windows and all applications (if that doesn't help he has to find a repair shop) or ask for another PC so you don't lose that time.
There is certain text that is just not displaying on my computer. This happens in both internet explorer and chrome. It seems to be random webpages have all or some of the text just missing. Here is one example of what I'm seeing.
http://imgur.com/aey3VQ4.jpg
This problem only happens on random webpages. Most display 100% normally.
This is a work computer that I've only been using a week, so I don't know a lot about it. I've tried adjusting the Encoding on Chrome, but it did not help. I can only assume that since this is happening on both chrome and IE it's a problem with the computer.

Chowhound
Comic Vine
GameFAQs
GameSpot
Giant Bomb
TechRepublic