|Are you willing to lose everything & start fron scratch? Do you have all the latest device drivers ready to install? Do you have anti-virus & all your other programs ready to reinstall?|
Assuming you answered yes to all questions, all you need to do is boot off the Windows disc & follow the instructions. Delete ALL partitions, then create at least 2 new ones - one for Windows, one for Storage. You didn't post the size of your HDD so I can't make any recommendations about the partition sizes. Format the partitions using NTFS. After that, simply proceed with the installation. If you are unable to format the 2nd partition, it can be done from Disc Management after Windows is installed.