ok so i got new vegas and was playing it for about 4 hours last nigth with no prob whats so ever,so then i saved it and went to bed.and when i tired to play it today im getting this "Application load error P:0000065432" and im not sure if its my comp or the game and im not sure how to fix it.i have been looking all over the place online trying to find a way to fix it but so far no luck.any kind of help would be great

Run Steam as an administrator?

lol i wouldnt know how to do that

Right click the steam.exe file, choose properties, Compatibility tab, "Run this program as an administrator".

See if that helps.