Computer not booting after windows logo during format

i recently installed mac theme in my laptop,,, since it made my lap slow.. i though i would uninstall it... i uninstalled it.. and it asked for restart.. the computer is not booting after it,, and then computer told, there is a problem wih drives,, so i should reset,, it asked if i have to reset all my drives,, i gave the option,, then i thought i would format my computer,, i use pendrive to format, since my dvd drive is n working... my computer was working in windows 8.. so i used windows 8 to format... it started booting initially... then it got stuck in the black screen after windows logo.. so i thought i would use windows 7,, same thing occured.. windows starts loading files,, wndows logo comes,, and then came black screen with pointer,,, i waited for almost half an hour.. no change... here are the photos of my screen,,,, then i thought, it must be the problem with my pendrive,, i used another pendrive,, whicj also gave the same result.... so i thought i would use network booting,, i have another computer .. used it to download SERVA,,, after many tries,, it is not working properly,, i think i m not sure about configuring it,, but my lap was responding to network boot.. please tell me what could be my problem.. the lap was working fine, until i unstalled mac theme,, here are the pic