So I build my new computer up but keep a old 500gb hard drive from my previous build. I bought an ssd and put my os on there and then 500gb hdd for extra storage. Once set up I start installing drivers etc until I notice my hdd disappeared from my comp. urgently did a reboot and there it was again, it came back. However it kept disappearing the I incurred some freezes. I turned the sleep timer off on power settings and I have also changed round Sara cables to make sure it wasn't them. I also ran windows without the hard drive in, just from ssd and it worked fine, no freezes or anything. Will this be due to a bad hdd or will it be something else that can't handle the hdd being in? Thanks alot