I've just tried to reinstall Vista onto a fairly new Dell laptop due to a few glitches but I've made one or two mistakes so need a helping hand! My hard drive is partitioned into two drives. The OS (Operating System) <C:> and Recovery <D:>. I accidently installed Vista onto the Recovery drive and don't know how to remove it. I now have two operating systems to choose from at start up How do I remove the one from the D:? Also, after installing Vista onto the C:, I now have a folder called "Windows.old" which is around 13GB large. Is this folder needed or can it be deleted? Thanks in advance.