I think you can try to do this again!
A:
a. Open the "Start" menu.
b. Type %Windir%\Inf in the "Search" box and press "Enter".
c. In the window that opens, find the file named "dfrg.inf".
d. Right-click on "dfrg.inf" and "Install."
B:
a. Go to "Start > type cmd" on your computer.
b. Copy and paste rundll32.exe setupapi,InstallHinfSection DefaultInstall 132 %windir%\inf\dfrg.inf and press "Enter"
c. Click "OK" to make the program automatically reinstall itself.
C:
a. Go to Start >All Programs>Accessories>Right Click on Command Prompt> select "Run As Administrator"
b. At command prompt, type regsvr32 dfrgsnap.dll and hit "Enter."
c. Type regsvr32 dfrgui.dll and hit "Enter."
Tomas