Upper and lower filters


  • In order for me to delete upper and lower filters I first have to know what they are.  Can someone explain to me before I make a big mistake!  Thanks!
    • Moved by Carey FrischMVP, Moderator Thursday, November 10, 2011 3:39 AM Moved to more appropriate forum category (From:Windows Vista Setup)
    Wednesday, November 09, 2011 4:56 AM


  • UpperFilters and LowerFilters values, sometimes incorrectly called "upper and lower filters," might exist for several device classes in the registry, but those values in the DVD/CD-ROM Drives class tend to corrupt and cause problems most often.
    If you're in trouble with the CD/DVD unit, read the Microsoft Knowledge Base article that you find at the following address


    Luigi Bruno - Microsoft Community Contributor 2011 Award
    • Proposed as answer by Sabrina Shen Thursday, November 10, 2011 6:10 AM
    • Marked as answer by Sabrina Shen Monday, November 14, 2011 5:15 AM
    Wednesday, November 09, 2011 4:06 PM