Deleting Win 7 Leftovers after Win 10 install and installing Win 7 in New Partition for dual boot

[ProWalt]

While installing Win 10, I decided to keep Win 7 and set up a dual boot. Unfortunately Win 10 took over the OS and I never could log back into Win 7. However, at start up, I still get the dual boot option but weather I choose Win 10 or Win 7, they both go into Win 10. BUT, Win 7 appears as the default so if I don't click the Win 10 option the system will load Win 10 but this option has some sort of problem and it causes my system to crash. How can I delete all Win 7 option left-overs and reinstall it into another partition so that I can still run Win 7 when I want to. Tried doing it in BIOS and it does not work. The Win 7 booting also takes forever since it loads: "Start PXR over IPv4" and then "Start PXE over IPv6" which takes forever. I need Win 7 to run some old hardware and software which will not run on Win 10.

 

[Lutfij]

The best course of action to take would be follow up this guide in order to pull off a dual boot with both Windows 10 and 7/8 on the same system.

I would however like to stress that you should backup all your critical data should anything go wrong. As it is there are a number of threads and articles strewn across the www speaking of bad installation and lost data. Windows 10 has been phenomenal but there are instances where a minor edit in registry or a power failure was enough to cause it to go awry. Is it possible to state your full systems specs? If a laptop please include your make and model number.

Is this installation of Windows 10 from an upgrade?