Have you found a solution because I have the same problem with an ACER ASPIRE 5520 running with Windows 7. The problem came while I was upgrading from Vista to 7. Also, if I open the System Informations windows, under Software Environment, Driver
System, at the Starting Mode column, it is written Deactivated for:
cdfs, CD/DVD File System Reader
crcdisk, Crcdisk Filter Driver
ws2ifsl Driver IFS Winsock
I hope those informations help find a solution.
Thank you in advance for your help.
Also, when I go to BIOS, I can open the reader door with the button. As soon as Windows 7 start, I loose power.