I don't know what problems you have been having in the past. I haven't been on the forum much lately. If you seem to be getting the same broken install you got before however, I would ask this question. Are you sure you are using a good install disk? Did you burn it s-l-o-w, 8x or less. Did you burn it in a RAW mode, usually listed as DAO or SAO. Did you check the md5 sum of the finished cd or dvd against the one published on the Mint download site?
If you answered no to any of the above questions I would suggest you re-download or at least re-burn your disk and try again. Make sure you backup any data you have in home you want to keep and check the format for the / and /home partition if you have a separate /home partition.
Insanity: Doing the same thing over and over and each time expecting a different result.
Democracy is 2 wolves and a lamb voting on the menu. Liberty is an armed lamb protesting the electoral outcome. A Republic negates the need for an armed protest.