Wasn't sure if I should post in the Storage forum or in any of the OS's but since it's a cross-OS question .. decided to post here. Well, the post concerns Win7 and Win10 cos i have both of them installed. I am on a notebook pc, HP, and it has 2 drive slots. In 1 I have my ssd where my os's are and in the 2nd slot i got a 1tb hdd. I've partitioned my SSD and have my 2 OS's there. The question now is - does it matter in what order my OS's are installed? I'm asking cos i once read it should be first the old one and then the newer one, but as you can see from the screenshot it's the opposite in my case. Is it a problem? The reason it is opposite is because at first I had installed 2 win7 on those 2 partitions, but then the Windows7 on the 1st partition got messed up so I was left with the 2nd one and was using it for quite some time until I decided to install Win10 in the place of the 1st Win7, the messed-up one, that is. That's how I ended up with the setup of having Win10 installed first and Win7 after it. I am sure it was on Tom's where I read that the order must be - first the older OS,win7, and then the newer, win10. Does it really matter? Any opinion, pls? 
