Facebook and Pinterest not fully loading.

I'm having problems with Facebook and Pinterest, both are only showing menu bars.
Given how much I use these sites I really hope you can help.

Pinterest has never worked on this laptop, it only ever loads the menu bar at the top of the page, nothing else. Last night I was playing around with Internet Properties and Chrome extensions to see if I could get Pinterest working, only since last night now Facebook is doing the exact same thing; loads menu bar, nothing else. 

Both sites work fine on my mobile phone - so not a problem with sites or with my accounts.
Tried accessing sites via both Chrome and Firefox - same problem on both browsers. 

I've had odd problems with Chrome not displaying certain things on pages before, but never this bad and in the past I believe it was due to Ad Sweeper causing problems - last night (prior to Facebook problems, in an attempt to fix Pinterest) I removed Ad Sweeper and AVG anti-virus extensions from Chrome so currently there are no extensions showing. I've attempted to re-trace my steps to undo anything I might have done in Internet Properties, but so far no luck - I've also cleared browsing data/cache and updated Java just in case. 

Operating System: Windows Vista Home Basic SP2
Web Browser: Chrome 16.0.912.75 m and Firefox 9.0.1
Level of Experience: Beginner

Behind LJ-cut is what I'm seeing, just to be clear what I mean.