HEY, THERE IS PROBLEM OCCURING WHILE INSTALLING WINDOWS 7 TO MY LAPTOP. I HAVE FORMATTED THE ALL THREE DRIVES AND THEN DELETED THE TWO DRIVES AND NOW ONLY ONE DRIVE IS PRESENT OF 298 GB. BUT WHILE I TRY TO CREATE THE PARTITION BY PRESSING NEW NOTHING HAPPENS. THE FORMAT OPTION HAS GONE. AND WHILE I TRY TO TO INSTALL THE WINDOWS 7 IN THE SAME 298 GB DRIVE - IT SAYS -- setup was unable to use the existing partition because it does not contain the required free space.
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You are not talking about drives it sounds like but partitions. You did not have to format any of them, once you remove the partitions and create a new single one, it's the same as formatting, all the data is cleared out.
Start over. When you get to the disk selection, remove all partitions, create a new one, Windows should format it when you install it.