When i try to start my cubase 7 it stops and it says plugin manager in the bottom of the “startframe” . And it also comes up a message: Instructions on 0x0000000 refered to memory on 0x00000000 following error was returned the memory could not be written. Been working with 7 for five years without any problems Have done all windows 7 updates
A thought…
Apparently something was corrupted. Have you tried going into the Window programs and features menu and doing a “repair” on your CB 7?
Regards 
I’ve had same problem and the repair process Prock mentions worked for me 