Windows 10 pro 64x won’t Boot. I can't Fix it with Startup - Microsoft Community

hi. used have installed on pc windows 7 professional 64x edition. last year updated software through microsoft update center , pc running windows 10 pro 64x. working great following official updates.

yesterday had reboot in safe mode (trying old way) f8 through bios couldn’t understand why pc booted windows. f8 didn’t work. never searched web find trick in windows 10 safe mode managed open msconfig in windows 10 and check boot in normal mode option (i blind missed “boot in safe mode” option). messed bootloader. when start pc have 0xc000000f error , hiting enter there start windows 7 (??) option when select there no respond. after searching hours solution , using pc managed create windows 10 installation mediawith usb drive. system restore , startup repairare not working. in command promptinterface (x:\source), typing “bootrec /fixmbr” successful when type “bootrec /fixboot” message “the element not exist”. trying find out going wrong found windows folder in drive l if other files (including users) in drive c. typing diskpart , input list volume i can see list drives in ltrcolumn there no letters drives.

i don’t know next. confused , ‘m afraid mess more decided give up. please, need help.

***post moved moderator appropriate forum category.***

hi mike,

this issue occurs because drivers have no assigned letters yet. assign drive letters in diskpart command, suggest type following in command prompt:

1. open command prompt.
2. type diskpart , press enter.
3. type list volume , press enter.
4. type select volume , number you'll want modify , press enter. example: select volume 0.
5. type assign letter = " " the letter want particular drive , press enter. example: assign letter=c.
6. type exit.

also, reason why cannot boot in advance boot option pressing f8 during boot process because created design in windows 10. enable it, suggest type in these commands:

1. type bcdedit and press enter.
2. type bcdedit /set {default} bootmenupolicy legacy , press enter.
   
3. type exit or can close command prompt.

once done, suggest reboot pc , check if makes difference. this automatically enable legacy advance boot option in windows 10.

let know if need further assistance.

Windows / Windows 10 / Power on or off a device / PC