The Windows Search Companion seems to have thrown a bit of a wobbly on my office PC (running Windows XP). Searching for files that contain a word or phrase returns exactly the same results as using the "All or part of the file name". As a result, I can't search the contents of anything - even straightforward text files.

Helpfully, Windows Desktop Search simply doesn't return anything at all.

Anyone got any bright ideas on how to fix this?