Hi! I bought my 13" Macbook Sept 2007 and I've cleared it off and reinstalled everything once since I bought it just to keep it clean. I haven't had any problems until yesterday (June 28, '09), I tried to start it and it won't go past the gray screen with the logo and spinning disc. I've tried these suggestions: http://docs.info.apple.com/article.html?artnum=303124 None of these have worked. Tried the PRAM, taking out the batter and adapter and holding down the power key etc. Apple should be calling me tomorrow morning, and if I fix it, I'll share tomorrow. Thanks for any additional suggestions.