I don't know what to suggest, other than disabling part (or all) of SystemWorks. It's also possible that some feature of that software merely needs to be configured properly for your system.
If this behavior (particularly in conjunction with frequent redrawing) were occuring on a system which was not running SystemWorks I'd question whether the icon cache size was set correctly. It may have something to do with this on your system as well since the Norton software does alter the registry.
I know a simple registry entry you can tweak. It will certainly do no harm, and it might help. If you're interested, just run regedt32.exe (NOT regedit.exe) from the Start|Run dialog and navigate to this key:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\explorer
Assuming that this has not been altered from the default (Default is no entry, meaning a value of 4000.), you will need to use the Add Value choice from the Edit menu. Enter "Max Cached Icons" (no quotes) in the dialog, and set the type to REG_SZ. Note that there are spaces between the words in the value name. Enter "8000" (no quotes) in the next dialog box (string editor). Quit regedt32.exe. A reboot (possibly logoff / logon, but I'm not certain) should tell you whether or not this has fixed the issue.
Perhaps someone else who's experienced with the Norton software will have something specific to that software to suggest. Good luck!
Regards,
Jim
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