how to set a shedule to remove old defination on symantic antivirus corporate edition 10.

The old definitions have to be kept to cover old viruses.
Or do you mean the temp files(where all downloaded files go)before the installation of the virus definitions?
Symantec also has the protected recycle bin that backs up all the deleted files which takes a lot of space which you can disabled.

Have you tried cleaning your temp folders?
Download and run ATF Cleaner by Atribune.
http://www.atribune.org/ccount/click.php?id=1
 
Reboot your computer into Safe Mode.
 
Double-click ATF-Cleaner.exe to run the program.
Under Main choose: Select All
Click the Empty Selected button.

(If you use FireFox or the Opera browser,
To keep saved passwords, click No at the prompt.)

It's normal after running ATF cleaner that the PC will be slower to boot the first time.

OR:
CCleaner:
http://www.ccleaner.com/download/

hello rpggamergirl,

This the temp folder path

C:\Documents and Settings\All Users\Application Data\Symantec\Symantec AntiVirus Corporate Edition\7.5

The above folder 7.5 has another folder xfer_temp in this folder are OLD virus defination that build up over time.

I was thinking about some kind of rule of action within the symantec product

instead of third party product to remove the residue within the above temp folder.

If symantec did not cater for this then i will have to use the third party software

as per your recommendation.

Regards
Jomo

Go with rpg's advice.
I have seen Norton/Symantec hosts with 20-30 of those 'temp' folders filling up workstation and server HDD's with hundreds of MB's of files.

I used to manually clean all that junk up - but that was before something like CCleaner was available.

Vic