how can i run the cmd in my pc its not even booting up


You need either an Installation disk/drive or repair disk/drive. Easiest to obtain would be e repair disk, but you would need another PC running Windows 8. Simply type 'Recovery' at your Start Screen then it's 'Create a recovery drive' (8.1) or from Settings if its 8.
Ignore the Recovery Partition at this point, and remember to change the Boot order to make your DVD 1st, or a USB device if you decide to use a USB pendrive.
 

MATHEW143

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