sir pahelp naman po dito, bigla nalang nag ka ganyan after ko mag restart.
mag boot ka ng OS mo sa USB, then punta ka sa repair>cmd
nakita ko sa google
From the Command Prompt, type dir "drive": and press Enter.
-If drive A: is found and a directory is displayed, check for the \Windows folder in the directory. If it is there, that is the System Drive. Skip to step 2.
-If the drive is not found or it doesn’t contain the \Windows folder, type dir b: and press Enter. Continue through the alphabet until the drive with the \Windows folder is found, but skip the X: drive. That will be the install files from the USB or DVD you are using. The most common location is the C: drive, so that example will be used in the rest of the article.
*Once it is found, type:bcdboot C:\Windows /S C:
-In this case, C is the drive where Windows folder was found. If the Windows folder is on a different drive, use that drive letter instead of “C” in the bcdboot command above.
-The message Boot files successfully created must be shown before you can continue.
-Type: diskpart and press Enter.
-Type: list disk and press Enter.
-Type: sel disk C and press Enter.
-In this case, C is the drive where Windows folder was found. If the Windows folder is on a different drive, use that drive letter instead of “C” in the sel disk command above.
-Type: list vol and press Enter.
-Type: sel vol C and press Enter.
-In this case, C is the drive where Windows folder was found. If the Windows folder is on a different drive, use that drive letter instead of “C” in the sel disk command above.