I got a copy of fallout 1 from the 'net and when I tryed to run it, it said that I didn't have enough space, but my C drive has atleast 50 gigs. Why did this happen and how can I stop it?

Try setting compatability modes. Set it back to '98

Then try this:

In your Fallout directory find the fallout.cfg file and open it with Notepad. Note: Your file may look slightly different from the one listed below.
[system] <-----look under this paragraph
art_cache_size=130
cdlock=C:\Programs\mIRC\download\cdlock.dat
color_cycling=1
critter_dat=C:\Games\BlackIsle\Fallout2eng\critter.dat
critter_patches=C:\Games\BlackIsle\Fallout2eng\data
cycle_speed_factor=1
executable=game
free_space=20480

etc.
Change the last value to 0 (zero) instead of 20480.

I can't use the computer with Fallout 'cause my sister's using it, but I'll try that when I can. Thank you.

I didn't need to alter anything, it just needed Windows 98 compatibility mode.

I now don't have the ability to view videos like the intro or the overseer thing on the PIPBoy or Talking Heads.

Are you fully patched?

Till which patch? Mine is with the RAR called: Fallup13