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I've just updated a Windows Vista machine to Service Pack 1. Subsequently, I upgraded the previously disabled Norton Internet Security 7 (expired) to Norton Internet Security 2012.

On reboot I get a consistent blue-screen, caused by SYMTDI.SYS that says, DRIVER_UNLOADED_WITHOUT_CANCELLING_PENDING_OPERATIONS. How can I clear this up?

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    See pchelpforum.com/windows-vista-7/… and symantec.com/connect/forums/… for similar issues Mar 6, 2012 at 16:08
  • You could/should have run the Norton Removal Tool - it often clears up errors caused by uninstalling Norton programs. Upgrading with a large version difference is essentially uninstalling and reinstalling.
    – Bob
    Mar 6, 2012 at 16:30
  • You really should install Service Pack 2 also.
    – Ramhound
    Mar 6, 2012 at 18:17

2 Answers 2

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I found SYMTDI.SYS in C:\Windows\System32\drivers by booting up in the restore mode, going to advanced system recovery options, and launching a command prompt. I renamed it to SYMTDI.BAK and rebooted successfully

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  • So, this may disable some functionality, but at least the system boots and seems to function OK Mar 6, 2012 at 16:21
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    The file in question is Symantec’s device driver. There is an exploit in versions from 2005-2006 in a report I found from 2007. symantec.com/avcenter/security/Content/2007.07.11d.html You really should be using Visa Service Pack 2. Be sure you clean the previous installation out before trying install the new version of Norton/Symantec
    – Ramhound
    Mar 6, 2012 at 18:21
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http://file.net/process/symtdi.sys.html apparently it crashes things on XP a lot, only one or two reports from vista. many people argue that its a part of Symantec or Norton. One guy says it crashes every dell he's tried it with. And they say malware sometimes uses the name. You can scan it at: https://www.virustotal.com/ assuming you can find and copy it. Bottom line seems to be (based on file.net reports) that switching to a different antivirus (Microsoft Security essentials Avast, AVG and ClamWin are some free options). If you can boot up in safe mode and uninstall Norton.?

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