The DWHWIZRD.exe error is associated with corrupted definitions on the system. You can follow this procedure to clean the definitions structure on an affected system:
If you are seeing several systems with this error, it could be that the server definitions are corrupted and since they are being sent to the clients, the clients would also have corrupted defs...
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Download the latest i32.exe file to the desktop from the security response web site
http://securityresponse.symantec.com/avcenter/download/pages/US-N95.html
1. Stop the Symantec AntiVirus service
2. Stop the Symantec Antivirus Definition Watcher service
3. On the client, open Windows Explorer and browse to the following location:
Windows = C:\Documents and Settings\All Users\Application Data\Symantec\Symantec AntiVirus Corporate Edition\7.5
4. Browse to the I2_LDVP.VDB folder and delete the .VDB subfolders
5. Browse to the 'VirusDefs' folder and delete all numbered folders. Delete all (if any) folders with a .TMP extension.
Windows: C:\Program Files\Common Files\Symantec Shared\VirusDefs
6. Run i32.exe from the desktop. This creates new numbered folders in the VirusDefs folder.
7. Edit the 'definfo.dat' file in the VirusDefs folder so that the value for CurDefs and LastDefs is the same as the new numbered folder.
example:
[DefDates]
CurDefs=20061222.009
LastDefs=20061222.009
8. Edit the 'usage.dat' file so that the value between the hard brackets"[ ]" is the same as the new numbered folder.
example:
[20061222.009]
DEFWATCH_10=1
NAVCORP_70=1
9. Start the Symantec AntiVirus Definition Watcher Service.
10. Start the Symantec AntiVirus Service
Verify that the virus definition date has updated in the local user interface. It may take a few minutes.