I just had my computer upgraded with an extra hard drive. Now instead of being the d drive, my CD-ROM drive is G. I just noticed when I put my bookshelf CD in, the CD-ROM drive gives me messages like device not working properly, or it prompts me to put the bookshelf CD in drive G even though it is in and when I click okay it refuses to recognize it. Also it has replied with an error message " msr.dll not something blah blah blah. Any idea what's going on here? I won't be able to get the tech for several days.