don't reformat
check for a firmware update for the drive
uninstall the upper and lower filters
scroll down to how here
http://support.microsoft.com/?scid=kb;en-us;314060&x=12&y=13#
clean the lasers with a cleaning disk
check for a firmware update for the drive
uninstall the upper and lower filters
scroll down to how here
http://support.microsoft.com/?scid=kb;en-us;314060&x=12&y=13#
clean the lasers with a cleaning disk