Fixboot & fixmbr messed up my OS help please

Hello,

Im using my mobile phone to post this, all happened when my laptop was dam slow and i turn off to it have a refreshment then didnt log again gone to that blue screen saying sthing which i couldnt read, i tried load on safe mode and all the other options too, then i got a win cd xp sp2 to run recovery but then was asking for a command i did a little search with this same mobile phone and fist command it poped i typed i know was not very smart of my side, then it said there first type fixboot i did n restarted till there ok so no fix then the msg on forum says type fixmbr if first option doesnt work, i did, so now im getting the message on system recovery prompt comand i do not have disk drive instalation i tried diskpart it shows 76317 mb disk 0 at id 0 on bus 0 on atapi and the following msg setup cannot access this disk. I tried run chkdsk but it says no path no disk sthing like this... and the worse problem is this laptop is not mine so imust fix it and give as i received somebody help me pls. Sorry my english my main language is portugues. Thanks