Using Windows 10 and Windows 7 (Dual Bios)

Hi.
I want to have two OS on my computer, one on my HDD and one on SSD. I already have Windows 7 on HDD and I also have Windows 10 on my SSD but I don't use Win 10 because I somewhere read that for using Windows 10 and Windows 7 in one computer, you must disable fast boot on Win 10 because it may lead to CHKDSK when you want to work with Win 7 and other problems may happen. I want to know is there anything else that I should do to use Windows 10 and Windows 7 in a computer without this CHKDSK or other similar problems? Is just disabling Fast Boot enough?
Thanks and Sorry for my English.

Try3 said:

Disabling Fast start is useful to avoid awkwardness but is not, of itself, a critical step.

There are full procedures in
[if Windows 7 is the currently active OS - which I think is your situation]
How to dual boot Windows 10 Technical Preview with Windows 7 by JWStuart [I used this procedure when I set up a Win7-Win10 dual boot].
and [if Windows 10 is the currently active OS],
Windows 10 how to dual boot with Windows 7 - JWStuart
The references to the Technical preview merely reflect the date they were written; they are still valid.

Denis

Hi.
As I said in my question, I have Win 10 installed but I don't use it because I think chkdsk may happen. I read the How to dual boot Windows 10 Technical Preview with Windows 7 by JWStuart But I think it is more about installing the windows and didn't add anything more than Disable fast start to prevent the problem. You said it is not a critical step, so what is the critical step?

And another question which doesn't relate to the previous. If I upgrade my Windows 10 (old build) with an ISO to newer build, can it cause any problem in Windows 7?

Thanks.