You don't need a dual boot with Linux to access and change/delete files Win 7 won't let you modify.
All you need is a Linux LiveCD.
I'll be using the Ubuntu Live CD/USB flash here as an example.
First D/L the Live .iso from here
Link Removed
I'm using the older 8.04 LTS version here because I'm not familiar with the latest version.
Once your .iso is downloaded burn to a CD using the instructions on the D/L page.
This will create a Live CD that will allow you to boot Ubuntu and run it from the disk.
Once Ubuntu is fully booted click applications in the upper left of the desktop.
Choose accessories>terminal.
In terminal type these commands pressing enter after each command.
enter
the l is a lower case L. This command will show you your partitions.
Make note of the hda or sda number of your Win 7 install, it will be a NTFS partition, the only one if you have only one partition.
next type
enter
this will create a directory in /media to mount your win 7 partition to in the next step
next type
Code:
sudo mount -t ntfs /dev/sdax /media/win7
enter
note: sdax could be hdax if your drive is an IDE drive, the x is the number obtained from the fdisk -l command above.
You will now have an icon on the desktop that is a shortcut to your mounted Win 7 partition.
Double clicking it will open up your Win 7 install (C:\)
From here you can explore your files and folders and make changes to files Win 7 won't let you make when you are in Windows.
You need to be very careful here because Ubuntu will allow you to make changes that can
harm your Win 7 install.
Changes Win 7 would never let you do.
In the context of this thread you would navigate to windows>system32>imageres.dll to rename the file and you can copy the new .dll here as well if you have it saved to a thumb drive.
Be patient when opening the system32 folder it has a huge amount of data and will take several seconds for Ubuntu to populate it.
BTW, while in the Live CD you might as well see what Ubuntu is all about.
Because it is a LiveCD it will boot much slower than an installed Ubuntu and will respond slower because an optical drive is much slower than a Hard Drive.
A much more responsive alternative to the CD is to create a Live USB flash drive.
Use this little free standalone app to create a USB Live flash.
UNetbootin - Homepage and Downloads
D/L the windows version
no install is needed it is standalone.
Make sure a 2 GB or larger flash drive is plugged in
and start unetbootin by clicking the .exe file you downloaded.
Select the radio button at Distribution and choose the your distro ("Select Distribution") from the dropdown and choose the version from the "Select Version" dropdown.
In this case it would be Ubuntu and the version would be 8.04 LTS.
Select the Diskimage field by clicking the radio button and make sure iso is selected from the dropdown.
Use the button on the far right of this field to navigate (browse) to location of your .iso and then click OK. This will create a bootable USB flash Live disk.
Boot to it (most newer computers will allow you to boot a USB device) and Ubuntu live will boot very fast (compared to a CD) and run fast, much like an installed Ubuntu will run.
You will probably need to change you boot order in BIOS to boot your USB Live Ubuntu.
Running Ubuntu Live will not make any changes to your HDD unless you run the installer on the desktop
or mount your Win 7 or other partition like above and deliberately make changes.
Again be very careful.