My screen goes to blue screen of death lol, and it says stop c0000021fatal system error the windows logon process system process terminated unexpectedly with a STATUS if 0xc00000139 (0x000000 0x00000000) the system has beem shut down.......or something like that, try rebooting, and it reboots, but goes straight to the blue screen, could not even reach the option of safe mode only 2 options of Hard Disk or CDROM, both the same RESULT, then i managed to GET to the screen with the options by pressing f8 when the screen goes black when the computer starts up, so i try safe mode, then SEE the windows icon, but still blue screen,try all other options but still not working....i have a pentium d computer lol, xp, ....been looking for hours online for a solution but the only things i see us either take pc in for repair or get a recovery cd? I was wondering if there was any other options please? I was also hoping i could somehow get some of my data? Any way i could put the data on a disc? I also have a USB pen drive, any way i could transfer data into there?.Any help would be appreciated, thank you.In your case you need either another computer or a local friend.  You want a USB boot device taht has a version of Linux on it. Linux is free, so there is to license issue. You boot with the Linux USB thing and then copy you personal data onto your USB drive.
After you have a backup,  try and install XP again from the XP CD. You will need the product key again. Even tho XP is out of date, it is still a licensed item.

BTW, the best time to make a backup is before trouble happens.