Secondly next time you have a question ask it as a Question in the Question side of TR that way you get a E-Mail every time someone answers you and you don't have to wait up to 24 Hours for the Once a Day for Notifications to discussions.
Now to your problem there are several things that could be at issue here the most likely is a Faulty Stick of RAM but without knowing what it is that you have in the way of Hardware or what version of Windows it is that you are trying to install it's very hard to say much more other than download yourself a copy of the [b]Ultimate Boot CD[/b] from here
http://tinyurl.com/3jnpy
and test your Hardware. That way you will at least have a starting point to work from but even then if you have recently added RAM to the System it may pass the test but still be an issue as the RAM may work but different Sticks have a Different Timing and this can cause issues with instability of a system.
So if you would like to post back with the Hardware that you have and the version of Windows that you are trying to install we'll try to help you out. However it is likely to be faster if you do this as a question simply because many people who answer questions don't look on the Discussion side of things. Then individuals are not on line all the time either.
Col