I've uploaded the full 4.2 here for the time being: http://drop.io/4eod1ht You'd do best to completely delete 4.3 (including registry entries if you are comfortable finding and deleting them). Before you do so, be sure to back up anything you have in SonicStage... 1. Uninstall 4.3 via add/remove programs 2. Delete the following folders: "Documents and Settings/All Users/Application Data/Sony Corporation/Sonicstage" "Documents and Settings/All Users/Sonicstage" "Program Files/Common Files/Sony Shared" "Program Files/Sony/Sonicstage" "Program Files/Sony/Personal Audio Driver" 3. Delete the following registry keys: 'HKEY_CURRENT_USER/Software/Sony Corporation/Sonicstage' 'HKEY_LOCAL_MACHINE/Software/Sony Corporation' 4. Make sure your AntiVirus is temporarily disabled, and reinstall using 4.2 5. Enjoy! -Aaron EDIT: The installer was grabbed from this site awhile ago, but to be safe there are various online single-file virus scanners available if you would like to scan the file for viruses prior to installing. I know disabling antivirus can be nerve-racking. ...Alternately you can just point yr antivirus to the downloaded file prior to disabling it to install... EDIT 2: If you still encounter the issue, perhaps try reinstalling/upgrading Windows Media Player?