Hi! I have an HP Probook 4525s, running Windows 7, with a DVD-RW drive. I attempted to open a burned CD-R that had photos on it, but when I stuck the disc in, and attempted to open it, it said it was a blank disc. I was able to open the disc on another computer just fine. I was wondering why I wasn't able to open it on mine. Any help would be appreciated. I have been able to open other discs fine.