Windows 10: Windows 10 will not boot after Windows 7 Dual-boot Installation.

I recently installed Windows 7 alongside Windows 10 for better support for older games, however Windows 10 will now no longer boot, it simply goes to a black screen with a circle of spinning dots with occasional disk activity. I have left it like this for at least 3 hours with no change. I can access WinRE as when booting it gives me a Windows OS Selection Screen in which I can select Windows 10 and press F8.

Things I have tried:
Safe Mode - Backlight on, nothing else.Safe Mode with CSM/Legacy Boot off - Same result.Startup Repairbootrec.exe from Windows 10 Installation DiscBooting normally with CSM on/off.Enabling boot logging - Gives me no logChkdskSFC
According to Microsoft (https://support.microsoft.com/en-us/...creen-problems) this is an issue with graphics drivers however I have not changed any graphics hardware or software on the OS.

:)

 

windows 10 slow boot

I was having a slow boot issue on my Windows 7 install a little while back. It would take about 30 - 40 extra seconds to boot up for whatever reason.

I would try following these steps, while this didn't solve my issue, it did increase Read/Write to where it should be.

http://www.disk-partition.com/kb/tips-ssd-optimization-windows7-1.html

Looks to be similar to this: https://www.back2gaming.com/focus-story/ssd-optimization-for-windows-10-windows-8-and-8-1/


In the end, I had to reinstall my Windows 7 entirely to fix the booting issue. It was taking around 35 seconds to boot, and after the fresh install it takes about 7 seconds to boot.

 

What is the best way to set up a dual boot of Windows 7 and 10 after a fresh install of Windows 10

Windows 7 and 10 hate each other, I had dual boot W7/10 and they just want to repair each other all the time which ends up screwing the install and then refuses to boot. You have to install W7 first I think then Windows 10, you cant do it the other way around. This was on 2 separate HDDs

 

Dual Boot Windows question.

here is a guide that should do the trick: How to Dual-Boot Windows 10 with Windows 7 or 8

Just remember if u want UEFI on Windows 10 u most have UEFI on your Windows 7 too if not u need to go change it in the bios everytime u want to go back to Windows 7.