I am new to this site, and am looking for some help. Two years ago, it looks like some other people were having the same trouble I am. Both my DVD and CD drives vanished from "My Computer". They still show up in Device Manager, but they both have yellow exclamation points next to them. The fix two years ago included deleting upperfilters and lowerfilters, for the drives, from the registry. This sounds totally like my problem. My question is: how do I get to the registry? I tried doing a Windows search and was unsuccessful. Please help me get to the registry.