i got my presario 2100 about a year ago(used) and it seemed to work fine other than the battery pack was lacking to hold charge. i downloaded linux ubntu and it worked great for the first little while then it started freezing. its not bad but it does it at horrible times, like when im trying to download pics from my nikon s610, and when i have more than one desktop screen working at the same time. my question is do i need a new laptop or is there a program i need to add? would the battery pack...