can i go back to win 7

Hello Bill, and welcome to Seven Forums.

It depends on how your Windows 7 was originally installed?

If using a retail installation disc, then you could just do a clean install of Windows 7 to restore it.

If Windows 7 came preinstalled on your computer, then you should create a set of factory recovery discs before upgrading to Windows 8 to have to be able to do a factory restore of Windows 7 if needed in the future. If you like, please post back with what brand and model your computer is, and I'll be happy to find the instructions for how to create a set of recovery discs for your model. :)

You should be able to open Samsung Recovery Solution to have an option to create a "complete backup". This will be on page 83 of your manual.

Start Menu -> All Programs -> Samsung Recovery Solution

OR

By pressing F4 key during boot.

For the manual and drivers for your computer, you can get them at the Samsung link below.

Support - All-in-One PCs DP700A3B | Samsung All-in-One PCs

You're most welcome. :)

It would be best to save it to separate physical HDD (internal or external) than the one Windows 7 is installed on.

DVD's are not as reliable, and it would take quite a few for a complete image backup.

If your D drive is a separate physical HDD than the C drive, then you're good to go.

Otherwise, you'll have to be real careful not to delete or select it when installing Windows 8 to not delete it by mistake.