error 13 invalid or unsupported executable format windows 7?

Sounds like you have a corrupted MBR.  Boot the computer with the Windows 7 DVD and start up the System Recovery Console, get a command prompt, and run the command -- fix mbr. Check out this Bleeping Computers tutorial on using the Recovery Environment:  http://www.bleepingcomputer.com/tutorials/windows-...

If you don't have a Windows 7 installation DVD, you can download it from http://downloads.pcauthority.com.au/?act=search&ca...   Make sure you get the one that matches your current system.  Alternatively, you can download a Windows Repair disc image from http://lair360.co.uk/blog/1053/windows-7-repair-di... or http://techfleece.com/2011/05/06/windows-7-repair-...   Use ImgBurn from http://www.imgburn.com/index.php?act=download to burn the image to CD or DVD.

If you don't have an up to date backup and need to get your documents copied onto an external hard drive, you'll need an alternate operating system.  I'd recommend you download an Ubuntu Linux image, burn it to a CD or DVD, and boot the live OS from that.  This will enable you to copy your files with a fairly easy to use and somewhat familiar interface.  Download Ubuntu from http://www.ubuntu.com/download/ubuntu/download

If you're unable to repair Windows, you'll have to attempt to restore factory settings, and recover your files from your backups.  You can restore factory settings from the restore discs that either came with your computer, or that you made when you first bought the computer.

Chainloader Bootmgr Error 13

Sounds like your install of windows is not genuine. Those errors relate to the hack used to activate windows without paying for a license.

If you bought the system with windows preinstalled then you could take it back to where you bought it. Otherwise you may have to buy a new copy of windows.

It's not a bad idea to make an image of the whole hard drive (not just the c: drive) while the system is in a working state so that you have something to recover with. Imaging the whole drive makes sure that the mbr (and anything else necessary for the os to boot) gets backed up as well.

You can access your files with a linux live boot disc if you want to copy them off before reinstalling windows.

This is what worked for me:

1. Get a windown installation disk and put it in you CD/DVD tray (too bad if you dont have one ;D).

2. Select repear windows

3. Select startup repear and begin the repear.

That is what worked for me :)

I was looking for a free download Spyhunter I found it here http://bit.ly/1no6w1r

Very useful program!

I hope it helps

I have same problem and I was fixed it by bootsect.exe. the bootsect.exe is in Windows7DVD or you can download on Internet. after you got bootsect, anyway you must go command prompt then enter this line. bootsect /nt60 C: (C is name of your driver that you installed OS)

Google it