The webcam relies on pre-installed drivers, you need to state the model number of your laptop to acquire the correct drivers for it from the Fujitsu site - http://www.notebookcheck.net/Fujitsu-LifeBook-A-Series.23209.0.html
http://support.ts.fujitsu.com/download/index.asp?lng=COM&Level1=&LNID=
Next time, don't format the hdd until you acquire the drivers required for the laptop.