Hi and I'm sorry for my english!! I hope you'll understand them!! I installed my winXP at their begging and in the question "in which file system I want to be installed my new os" I definitely answered FAT32 because I didn't know which were the differencies between the 2 fs and I didn't want to have problems with my programs. Now, after reading your posts, I changed my mind and I want to change my file system without reformating and reinstalling all my programs (I have installed 10GB programs so far!!!!!). I know that my question is foolish but if there is a way of doing it I want to know it. Thanks.