Replacing missing or corrupt file

I have a desktop pc with Win 7 Home Edition 64bit OS. Recently when i started it all i saw was a black screen and it wouldnt boot up after that. I put my Win install disc into the CD drive and restarted the PC and received the message referred to in some other posts on this thread. It advised that i had a file either missing or corrupted ....the file is \CMLDR....then it showed STATUS OxcOOOOOOf ...

Once i placed the install disc in the drive and restarted the pc i ran the Recovery program and after running it the PC started normally. I thought my problem was solved until , after shutting down the pc for the day, I started it up the next day and it again gave me the black screen and failed to boot up. After several additional tries i figured out that for some reason the install disc will enable me to start the pc but DOESNT ACTUALLY REPLACE THE MISSING OR CORRUPT FILE.

i also have a repair disc for this pc which i burned when i first bought it but i havent used it because i also have the OS install disc.

my questions are
1. where can i get my missing or corrupt file so i dont have to keep using the install disc just to start my pc.
2.should i try inserting the repair disc instead of the install disc to possibly get this permanently repaired?
Any other suggestions you have will be welcome. My pc runs fine in all other respects. Thanks very much.

Have you tried doing a Repair Install with the installation DVD?

Repair Install

I have tried System Restore several times..no help. I have run the Recovery Console innumerable times and it always fixes the problem and the pc starts normally . Usually ,however, the next day when i start it up i get the same black screen and have to resort to inserting Win 7 install disk and run recovery console to repair it again. I read somewhere on this forum that it sometimes takes running the Recovery console several times before it gets fixed but i am way passed several times. All i need to replace is one file....CMLDR Is my only solution to reinstall Win7...which i really dont want to do.?
Thanks for your help.

Have you tried this tutorial?

Extract Files from Windows 7 Installation DVD

didnt know about this tutorial. will definitely try it. thanks very much.

Welcome :)

Blue... i looked through the turorial you referred me to ....a little too complicated for me in all likelihood. Would it be correct to assume a reinstall of win 7 is my only alternative to that?Im not a computer tech person although i have had every type of crash over the years and have always finally been able to fix them or just format the hard drive and start over.

It seems it may have to be that way, backup all your data you want to keep, and then perform a clean install. Once you have completed all the Windows Updates and installed all the programs you use regularly, then it would be good idea to create a Image Backup, you will be able to restore from this image in the future if you have any other problems.

Blue....fyi...i used my repair disc instead of my Win install disc and it seems like it may have worked. After booting it up i removed the repair disc and then rebooted it and it actually booted up. I guess i am confused as to why it would do that from the Repair disc and not the install disc. Can you enlighten me?
Thanks very much.

What is the condition of your installation DVD?

Glad your issue is solved :)