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Deleting Upper and Lower Filters is a way to solve problems related to viewing the CD/DVD Drive on My Computer. It is common to do this when a person can no longer see the Drive on My Computer, and/or the CD/DVD ROM Drive does not read or write any disc that is inserted into the drive. Upper and Lower Filters are codes in the Registry Editer that represent other, possibly virtual CD/DVD ROM drives that may have been installed from the internet that are corrupted. Deleting the Filters deletes a block on the original CD/DVD ROM drive that is caused by the corrupted programs. In other words, Upper and Lower Filters block the CD/DVD ROM drive from working properly.

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Q: Why do you delete upper and lower filters?
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