hi R R!
okay, sounds like you've already been to the "Tips" forum here, and the advanced troubleshooting Apple KB doc on burning. Have you done the rounds of your manufacturers to ensure you've got the latest drivers and firmware and also been to Windows update to see if there's a useful update lying about there?
I can also throw some more documentation your way from Apple and MS:
http://www.apple.com/support/itunes/windows/cddiagnostics/
http://support.microsoft.com/default.aspx?scid=kb;en-us;324129
... but the fact that you've had a sudden onset here means that we can conduct a few more investigations of our own.
so, if you've got time:
(1) could you please go to itunes "help > run CD diagnostics" and post it here? (you've already given us lots of good info, but we might as well get that on the table as well.)
(2) could you please tell us if you installed/uninstalled/upgraded
b any
hardware or software at about the time that this nonsense started happening?
(3) is your PC being a peculiar beast in any other ways at the moment? if so, could you describe the peculiar behavior?
(4) could you check your error logs for us. right-click "my computer", select "manage". click your event viewer. we should look through the application and system logs for:
(a) any cluster of warning or error events that happened at about the time that this burning nonsense started happening
(b) any warning or errors that seem to be conciding with any failed burns
(c)
b any
errors or warnings that "you just seem to get a lot of". (it's possible that a pre-existing condition has just flared up savagely recently.)
(probably worth having a quick look at your security log just in case anything peculiar-looking is happening there ... lots of errors and warnings for no obvious reasons)
if you find any "characteristic" error/warning events, click on one of each kind to bring up a window. note down the
b Source, EventID and Description
of the event, and post back to us with your findings (if any).
love, b