Avoid posting using all CAPS. It is considered bad etiquette and seen to be SHOUTING. When you say not able to install...... are you saying that:
1. You have no installation CD
2. You have no optical (CD/DVD) drive
3. Something else is the problem. If so what is it?The solution suggested by clive_pearce will only work if your laptop has a recovery partition and has not been deleted to recover disk space.
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☺ When everything else fails, read the instructions.