I have Vista installed on my 200GB partition (my only partition). I want to dual-boot it with Mint, so I'm trying to shrink it by 40GB. Diskeeper says that there's room to shrink, and Disk Management says there's room to shrink. But whenever I click "Shrink" it loads something for a minute then says Access Denied. I've tried every way I can think of to run Disk Management and DISKPART and access is always denied.
People have said I should use GParted, but I'll need my Windows install disk (I have it). Is GParted a safe way to do it?