2. You aren't using the appropriate driver for your graphics card. Download it from the manufacturer website and install it.
3. You've mangled cfg.txt (in the same directory as LFS.exe) - unlikely if this is a clean installation.
4. A single thread is enough thank you. Posting multiple threads in multiple locations is considered bad manners and likely to cause yourself confusion when people answer. Also try and make the titles slightly more descriptive than "help".
In main folder of LFS there is cfg.txt. You can found all options of LFS there.
Paste this to Your cfg.txt - "Screen Info 0 0 800 600" (without " of course , or if You have such a line in Your cfg.txt, then simply overwrite it, 800 600 is the resolution, like 800x600). Maybe it will help
Btw. Can You play any other games? Do You only have problems with LFS? What's Your PC configuration?
So You propably have huge problems with the drivers or directX,(as You have reinstalled it already, then... ->) try reinstalling graphic card drivers. Btw. Most of the people here are from Europe, and it's night here so don't expect to many responses . Be patient, in 12 hour there will be propably a lot more advices. It's midnight here so gtg to bed. Goodnight and goodluck.
Did you try and install the latest drivers for your graphics card? If it happens in other games, it isn't the cfg.txt, it must be driver related or something similar.