Where to install windows 7?

Hello. There is no reason of getting upgraded with windows 7 on windows older version. If you still want to install windows 7 without upgrading firstly Increase your disk drives in three partitions. Then install your older version in 2 Nd disk drive and then install your windows 7 in 1st partitions. this will help you to use both operating systems in one PC.(I also Use This Type of Partitions) (It has No Problems)