If you are like me and experiment a lot with your BTC and your wallet, than you should be prepared!
I tried to push my wallet.dat over to another PC and did this trough a USB stick. Deleted it on the first PC just to see that the USB stick wasn't working anymore on the second PC!!! (Bricks were sh$t)
Luckily I have this little tool (http://www.piriform.com/recuva/download/standard or http://www.filehippo.com/download_recuva) installed on every of my PCs!
With just a few clicks I got my wallet.dat unerased and everything went ok
![Cheesy](https://bitcointalk.org/Smileys/default/cheesy.gif)
So if you think this could happen to you, you should think about installing this little tool or any other Recovery/unerase tool just in case!
Because installing it after the loss could be fatal to your wallet.dat
![Wink](https://bitcointalk.org/Smileys/default/wink.gif)
Best regards!