when i try to install anything it wants paswords wich we dont no so i would like to start linux from scratch if possible

where would i find that

system info is as follows
model aspire one
operating system linpus linux lite v1.0.13.E
cpu intel(r) atom(tm) cpu n270 @1.60ghz
system memory 512 mb
hard drive 8gb
battery li-on 2200may
bios version vo.3109
firefox is the browser

i have got issues i cant resolve so was wandering if i am able to reboot linux from scratch
system info is as follows
model aspire one
operating system linpus linux lite v1.0.13.E
cpu intel(r) atom(tm) cpu n270 @1.60ghz
system memory 512 mb
hard drive 8gb
battery li-on 2200may
bios version vo.3109
any help would be great

i have tried to download google chrome but it is asking for a pasword and i have no ides what it is on the screen authenticating as root

i am trying to play some games on facebook but it wants me to install adobe i download it but i cant get it to work please can you help