Cd rom doesn't work.

I can't get my CD rom to work. It was saying incorrect function... now it says "Please insert a disk and retry" I've gone through my reg edit and taken out both the upper and lower filters, and still no effect. I've also tried a boot CD to make sure the drive actually works, and it loads the boot CD fine, so this is something windows related. I have no internet access at home, I am at work right now. Anyone know whats going on? I haven't installed anything new, it was working and it suddenly just stopped. help please

I think you removed the CD on the CD ROM while it is playing or it is being used by your PC. When you removed the CD, a pop-up window will appear saying "Please insert the correct disk and try again", usually you have to insert the disk recently you used. If you insert another disk, CD-rom wouldn't read that cd until you insert the CD you used recently, that's why you think your CD-ROM doesn't work but actually it is working.

is there any way around that? I don't think I have that CD anymore