Were is the C drive in ubuntu 13.04?

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http://askubuntu.com – I have been having issues with my wifi and a friend told me that if i copy the C drive to a memory stick and boot my system from it i can reinstall ubuntu 13.04 (which is what i have). Is this true? If so where is the C drive? Also I did a system test and under wifi it says that i am missing packages (doesn't say which one/s). I have done updates and all that include updating through terminal, and the wifi is still not working properly, one minute its fine the next it refuses to work, so I am trying to reinstall and see if that fixes the problem. I am using Dell inspiron mini 10. I also h (HowTos)