I just purchased a Dell Inspiron 2650 laptop with XP home installed. My experience with Windows PCs only goes as far as 95, though I've learned my way around XP fairly good so far. However when I go to check how much harddrive space is used up, I find that there is a discrepency of about 2-3 GBs when checking C:/ Properties, and viewing the file sizes of all the files in the C:/ drive. While this might not be an issue for people with 50 GB harddrives, I only have 18 GBs. I've turned off system restore, indexing, and shrunk the size of my swap file to about 300 MB, however the space still wont come back. I'm considering a clean reinstall of XP to get rid of any crappy options that Dell might have installed. Would this be a wise choice? And one final question. On my XP Home CD that was shipped with my computer, there is no serial number on it, and it doesnt even look like a Windows XP CD. It is just black and white and and says it is from Dell and contains Windows XP Home. Is this a full version of windows, or just a CD containing an image of XP. If I format my HD and do a clean install, will I be able to do a clean install?