Last week I had to wipe my computer due to a virus. A friend did this for me since I would have been clueless. Anyway He only had windows 7 but when I purchased my laptop it came loaded with Windows XP. Since he loaded 7 on my computer my mic doesn't work and my cam is upside down. How can I fix these issues short of buying a windows XP cd? (please note I am not a computer genius I know some things just not a whole lot) 