BOOTMGR is compressed

It started when I tried to compress my disk but started getting impatient coz it took years to finish so I cancelled it. Now, when im about to open there's this message -- BOOTMGR is compressed (ctrl alt del to restart) but sad to say -- it didn't restarted. And it's keeping back to the same message. I tried to ESC and there are these options like from f1-f4 (system checking and others) and f1, f2, f9-f11 options. When i press ENTER (continue startup) the BOOTMGR message is on a display again. It keeps goin to the same flow.

What will i do? I really need help from you guys. Thanks in advance.

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