kernal panic always come due to Ram. took out the 1 ram from the laptop and run the laptop. check kernal panic is coming or not . if coming then remove that one and put back the old one. if still same problem then reinstall the mac means first back up all your data the reinstall the mac with restore dvds or retail dvd. it will solve you problem. i have a same mac core i5 mid 2010 15 inch. i already faced this problem of kernal panic . this was solved by changing 1 ram . i m happy becoz my mac is covered with apple protection plan. try this will help you