problem with computer again. lol

I cannot get this computer to save my passwords and it keeps deleting all my cookies. also I cannot get into my system or my hidden files.
I have a Dell Demension B110. I just re-loaded my windows XP but it’s not opening the system or hidden files. Also I accidently clicked on here to not save anymore passwords. how do I change it back??
I really would like to try to do this without re-loading it again. I had to call Dell and it’s a major process because they don’t make this model computer anymore and I have to get some of the drivers from Dell.
Thanks
Susan