Syslinux error while booting from USB.

So on my Windows 7 desktop,  I tried uninstalling my dualbooted Ubuntu partition.  Well let's just say I don't think I did it right. I get this when I start my computer; Quote windows failed to start. A recent hardware or software change might be the cause. To fix the problem: 1. Insert your windows installation disc 2. Choose language settings. 3. Click repair If you do not have this disc, contact your system administrator or computer manufacturer for assistance. File: \boot\BCD Status: 0xc0000098 Info: the boot configuration data file does not contain a valid OS entry So pretty much I just want Windows 7 back usable. I have asked around, and someone told me to mount the windows 7 iso file to a usb drive, and boot it on start up.  I mounted it to the usb, plugged it in, and started it.  This came up; Quote SYSLINUX 3.86 2010-04-01 BIOS Copyright (C) 1994-2010 H. Peter Anvin et al No DEFAULT or UI configuration directive found! boot: _ Would it make any difference if I put the iso on a cd instead of a usb?  Any help is appreciated. Thanks.