PC won't boot. Possible to fix/replace system 32 files?

Did something really stupid. In an attempt to follow Instructions to replace window media player 12 with
WMP 11 for work purposes, I moved system 32 files from windows/system32 folder to
A folder on the desktop, and tried to replace them with "new" system 32 files downloaded from the instruction website. I manually set a restore point prior to doing this thinking that i would be able to restore everything back to normal if a problem developed. Well of course the moving and replacing not only didnt go as represented, but the pc now won't boot. And system restore says there are no restore points to go back to (why??). When rebooting pc goes into a type of repair mode the name if which i cant remember, but says it is unable to correct the problem. I do not have a recovery disc or win 7 disc--got lost in the move. And of course I have tons of data, music,etc files, so I don't want to restore PC to original out of the box condition. I would highly appreciate any help any of may have to offer. Thanks very much in advance.

Pretty reckless to butcher system files without any disk to boot to do serious repairs or even reinstall. Had you asked us someone here would have known how to do what you want.

Use the Win7 bootable installer provided in Troubleshooting Windows 7 Failure to Start to boot into System Recovery Options to try Startup Repair a few times, System Restore if it isn't offered, or if it won't run SFC /SCANNOW Run in Command Prompt at Boot.

If it fails you can try the other repairs but most of them are not tailored for those who deliberately ruin their OS, so you might want to skip to rescuiing your files to get a perfect Clean Reinstall. Everything is in the links provided.

How would you know it is reckless unless someone told you? Why is that brutal?

gregrocker,
I guess the same as you didn't know it was brutal until you were told. But then I didn't realize the forum was for the purpose of scolding first, then offering a few bones of advice, rather than just helping---my bad. Sorry to have wasted your time.

I am sorry if I offended you with my bluntness. I'll still be glad to help you resolve the issue. I'd hate for you to have to pay hundreds of dollars because I offended you.

Where are you on this now?

Have tried startup repair over 5 times with "unable to repair" message. System restore says there are NO restore points even though I manually set one prior to my stupid behavior. Have used command prompt to run sfc scannow, with message "unable to repair". Have just downloaded iso of win7 home preimium x 64, as I've been told I can try to use it as a "repair install" of win 7.Tried the win 7 iso burned to disc. When used to boot it gets just past "install now", then stops at an error message: "A required cd/dvd drive device driver is missing. If you have a driver floppy disc, cd,
dvd, or usb flash drive, please insert it now." So I'm stuck at this
point.

thanks for the reply. I will go forward with your advice and steps one aat a time. What exactly does "bad installer" mean, and how do I confirm the size of the iso download. thanks again