!!!HELP!!! IPHONE 4 STUCK ON BOOT LOGO SCREEN

i WAS INSTALLING A CYDIA APP WHEN MY PHONE CRASHED IN THE MIDDLE OF THE INSTALL. NOW IT IS STUCK AT THE BOOT LOGO SCREEN AND ANY REBOOT METHOD I HAVE TRIED HAVE BEEN UNSUCSESSFUL.

IS THERE A WAY OF DELETING THE CYDIA FILES THROUGH WINDOWS????

ANY ADVICE WANTED

P.S. ENTERING DFU MODE DOSN'T WORK I HAVE TRIED MOST SIMPLE FIXES...

THANX