I recently tried to install the windows 10 preview on my computer. I needed to dual boot, so I made a bootable usb with the .iso on it and restarted to boot from the USB stick. That's all fine, but when I got to the stage where you select the partition to install 10 on, it said something along the lines of 'you cannot install windows on a mbr drive. Convert to gpt'. How do I do that? And since I only and running one hard drive, will it erase all my data from other partitions or will it still be there afterwards? As well, for anyone out there who is using or has used windows 10, is it any good?