The Windows 7 repair disk is used to boot Windows 7 when it won't boot - to run Startup Repair, System Restore, access a Command Line, Recover using a Windows 7 Backup Image, etc. System Repair Disc - Create System Recovery Options If Windows 7 won't start now
boot the Repair CD to run Startup Repair which automates System Restore as well as numerous other tests including System File Checker which can repair system files which are not corrupted beyond repair.
If Startup Repair will not start it after being run up to 3 separate times with reboots, then boot back in and choose System Restore from the tools list to attempt to restore before you made the registry changes.
If Windows 7 still will not start, try booting into Safe Mode to run sfc /scannow to repair System files.
You can copy your files out of an unbootable Windows 7 using this method: Copy & Paste - in Windows Recovery Console - Windows 7 Forums.url
If all fails you can run the Recovery Partition using the key given on first boot screen, or look it up in your manual on Support Downloads webpage for your model computer. You will need to fill out your System Specs for us to help you research this information.
Or since your goal was apparently to get rid of the factory bloatware find a Windows 7 installer for your version to clean reinstall with the Product Key on the COA sticker on machine. Clean Install Windows 7 - Windows 7 Forums.URL If Windows 7 will start
, run SFC /SCANNOW Command - System File Checker
to try to repair System Files, or if neccessary use the installer to run a Repair Install which
reinstalls the OS while keeping programs, files and settings in place.