Missing Gzflt.sys File

I am running Windows 7 64 bit that will not boot because of a corrupted gzflt.sys file. The Windows utility is unable to repair the file so I'm unable to boot from the Hard Drive. I do have a Windows recovery disc and can not boot from that because I need the above file to boot. I was playing around with options and got into bitdefender safe mode and clicked on it but do not know where to go from there. I clicked on something wrong, but then it worked just the same way as before. Can anyone help me? Also, if I can get the file somewhere, I can get into command prompt. Can someone let me know where or what or how I can insert the file so it will work. Or something like that. I am mildly to poorly computer literate. I know more than a lot of people but much less then probably those who are reading this. Thanks for any help.