How to restore Win7 after installation of Win8 Cust Preview

Hi,
I've installed Win8 from ISO file, the problem is I didn't mount this image or burn on DVD but simply unpacked with 7zip. The result - win8 is installed on my primary Win7 partition (C:\) and my Win7 folders are moved to Windows.old folder. Is there any way to restore the Win7 ?
I found some instruction about Vista on How to restore a computer to a previous Windows installation after you install Windows Vista but in Win7 there are more folders saved and the bootsector has probably different name.
Could anyone please help me with that ?

Best regards,
Lbajon

Hello Lbajon, and welcome to Eight Forums.

First, be sure to backup anything that you do not want to lose to be safe. Next, you might see if you may be able to use the tutorial below to restore Windows 7 from the Windows.old folder. Just be sure to follow it exactly as is, and select the correct options for Windows 7 .

Windows.old folder - Restore into a new installation - Windows 7 Forums

Hope this helps,
Shawn