cubase usb deviceOS finish expected

The last time i started Cubase, this message appeared. does anyone know what it means?

regards
Standish

What version of Cubase are you running? What audio interface are you using? What OS are you running?

Thank you

My system: Windows 8 64 bit, 16 GB ram, cubase 7.06, RME Multiface driver 3.38
regards
Standish

have you optimized your computer for DAW work , like turning off all sleeps , did you leave the computer on for hours and then went back and expected it to work ?