The offboot sfc /scannow is pretty easy to do
http://www.sevenforums.com/tutorials/139810-sfc-scannow-run-command-prompt-boot.htmlWhen you first switch the computer on, at the bottom of the screen it will prompt to press F2 for setup which is the BIOS or F12 to change the boot order, but these keys may differ with different makes of computer.
Tapping the key to change the boot order as you switch on will give you a small window where you use the cursor keys to select ODD (Optical Disk Drive) - insert the disk and press enter.
This is a one off boot order change.
After pressing any key to boot from CD/DVD as prompted, you may get a black screen with an option to press F8 rather than it taking you straight to the splash screen as in the tutorial.
Press F8 then select Safe Mode with Command Prompt which will take you to the splash screen where you can then follow the steps in the tutorial for Method One.
BTW - you got those disks pretty quick