1. Boot SAFE MODE to see if that continues.
2. Boot but get to the BIOS setup and does it continue.
3. Sounds like a bit of malware, my Dell i15r does not use a software helper to do that so I'd try items 1 and 2 to sniff out if it's a hardware issue.
I have a Dell laptop (15 series). So when Windows 7 starts, it tries to eject cd/dvd-s that are in cd case (even when there is no disk inside).
Again, after 2-3 minutes, it runs "eject" again, and this repeating action continues for about 10-15 minutes.
Please help if you know anything about this kind of problem.