Symantec Antivirus constantly detecting .CLASS files as risks

Good Afternoon,
Lately Symantec Antivirus has been detecting lots and lots of .CLASS files as risks/viruses on our client machines. Most of the risks are detected as Trojan Horse. When I check the Risk History log on the Symantec Antivirus server, for the client, it shows that the files are being detected
In Vista - C:\Users\user's profile folder\AppData\LocalLow\Sun\Java\Deployment\cache\6.0\ - various folders
In XP - C:\Documents and Settings\user's profile folder\Application Data\Sun\Java\Deployment\cache\6.0 - various folders
The 6.0 folder contains folders numbered 0-63 as well as folders named host, muffin, and tmp. Usually I have the user go into the Java Control Panel and click the Settings button and then click the Delete Files button, to include the Applications and Applets and Trace and Log Files. Then I run a full Symantec scan on the client machine and it usually comes back clean.
In the Temporary Files Settings screen in the Java Control Panel, there is a checkbox checked to "Keep temporary files on my computer." If uncheck this option, will that affect anything? I am thinking that if this option is unchecked then maybe I Symantec won't keep finding these .class files on my client machines.
We used to just have the Java JRE on our client machines, but recently we have had problems with our software distribution packages throwing up errors about a corrupt .cab file during installation so we started putting the full JDK version on the machines. I am not sure if it is conicidence or not, but I am thinking that Symantec didn't start detecting all of these .class files until we started putting the JDK on the client systems.
I started to post this message on a Symantec forum, but thought it might be better suited for a Java forum instead, since the files that are being detected as risks/virus by Symantec are .class Java files.
If anyone has any info or suggestions on this for me it would be greatly appreciated.
Thank you,
Ms. Lawrin Walker

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