I have a CD-R containing a PDF. I am opening this with Acrobat Reader 7.07. When I try and print the PDF I get an error message: Adobe Acrobat: AcroRd32.exe - Write Protect Error The disk cannot be written to because it is write protected. Please remove the write protection from the volume (CD Name) in drive D (CD Drive): cancel, try again, continue?. Cancel lets you go ahead and print but I need to be able to print without the error.