A couple of months back I checked Microsoft's Windows 7 game compatibility site and discovered that Fallout 3 was listed as NOT being compatible with Windows 7; the entry said that the publisher had stated it was not compatible.

That entry has now changed:

http://www.microsoft.com/windows/compatibility/windows-7/en-us/Details.aspx?type=Software&p=Fallout%203&v=Bethesda%20Games&uid=&l=en&pf=0&pi=0&s=Fallout&os=64-bit

Microsoft now declares the game to be compatible with both the 64-bit and 32-bit versions of Win7. Perhaps they included a compatibility update in a recent round of patches?

At any rate, having just installed the retail DVD version of the GOTY edition on Win7 x64, I'm about to find out

It always was compatible it was just the codecs needed.....

But I haven't installed any special codec packs. The game just runs, and runs fine.

Why am I the only person who posts something like this, only to have to edit it a few hours later, when the game goes haywire? hehehe. Oh well, the freeze ups are only occasional, and the view is fantastic, and I hope your game is glitch-free.