Windows 7: Windows 7 won't boot and Recovery options don't work

I have a Lenovo G560 0679 series laptop, which i believe is a 64 bit system. Few months ago, my comp shown some blue screen and gave me boot up issues. My friend has been able to help me fix it a few times (he said he simply just let start up repair do its own thing). however, this time, he is away and is unable to help me. So I try to do the same thing, I run start up repair, and it says problems can't be solved automatically, I clicked on details, it shows that a problem signature is CorruptFile.

This time, theres no BSOD, but it kept leading me to the Start up recovery page (the one with sys restore, restore system using image etc and command prompt). I tried running safe mode, as well as safe mode with networking, last known good config, ran all the options on system recovery/system restore. It seems like the only option i have left is use the command prompt to fix the problem. I lost the windows installation CD, so some of the commands such as bootrec.exe is in vain. I don't really know what i'm doing any way when I use the command prompt.

As a last resort, I'm willing to reinstall my comp, what do i do so that i can save some files? also is it possible that I download the reinstallation file since I lost the original one?

Please help me out if you can, and let me know if you have any questions or need to know more info.

Thanks!

Work through these steps for Troubleshooting Windows 7 Failure to Boot

Any idea which version of Windows 7 is installed on your System?

You can download an ISO of Windows 7 from mydigitallife.info.

Burn it to a disk, install, and activate with your existing 25 character product key.

You need to download the exact same version to match your product key.

Or you can try a restore to factory specifications if you can access the recovery partition---which I assume Lenovo PCs have?

The new install won't have all that stuff Lenovo originally included.

gregrocker, i'll look into it tomorrow.
wanchoo, the sticker on my laptop just says windows 7... so...im not too sure. I mnight be able to find out through the command prompt. I'll report that back tomorrow if i find out.
ignatzatsonic, will a USB flash drive work? I don't have a CD. How would i do the recovery partition thing?

Yes, you can use a USB drive.

Recovery partition is probably accessed by a menu shown when you hit a key during boot. Not sure on Lenovos---might be F11 key?

Back up your data first.

How did you happen to lose the windows installation CD (DVD) ... ?
Was this an upgrade from Vista?

im a noob, but how do i back up data?
Jacee, I might have thrown it away when I moved last year >.< I threw away the box so the cd might have been in it, I couldnt find it anywhere in my house

First, you have to be able to find it. Then you copy it somewhere else, such as to a DVD or another hard drive or a USB drive.

Include bookmarks and email if you have any.

It's up to you to find it---we don't know where you put your stuff.

square,
Do let us know the results of following GregRocker's advice.