How to remove worms in my computer?

I have a worm, there is no doubt.I am saving my photos to Picasa/Google and plan to wipe the hard drive clean and reinstall windows 7.
Here are the question. Can I email to myself some documents(maybe 20) via yahoo mail and when i 'm back up running download them back?
Can or does the worm have a chance of reinfecting the computer again!!!
