Hi Hai,

Thanks for the post! You should be able to access your boot devices by hitting the F12 button at start up (as soon as the dell logo appears on screen). Boot settings can also be configured in the systems BIOS , F2 menu.

The article below describes the process of switching between Windows 8 & 7 on this system and contains additional information you may find useful if reinstalling your operating system.

http://www.dell.com/support/troubleshooting/ch/en/chdhs1/KCS/KcsArticles/ArticleIframeView?docid=590895&doclang=en#Issue5

Thanks,

I am having a problem converting Legacy to UEFI in Windows 10 Pro. After using MBR2GPT, I can convert the HDD to GPT mode, but after I change the settings to UEFI and disable legacy ROM (with or without Secure Boot), I cannot boot the system. I thought that this should have been really easy with the conversion tool. Gratefully.

I am working on test systems, so I can always revert to my original status. 

I tried to click on the link provided, but got no response. Can you offer any suggestions?