Virus Definition Update / Exclusions in Virus Scan

Hello, everybody,

I have two problems with Norton AntiVirus:

 

a) Shortly after upgrading my AntiVirus, in July/August, I got Updates several times a day (sometimes an Upgrade every 2 hrs) - nowdays, i can t even get Upgrades when I initalize it manually (Get the answer: System is on latest level), for even days (2 or even more days). Whats wrong? And what can I do?

 

b) Since yesterday, when I do Virus Scanning, I get the message: "Exclusion in c:/progra~1/gemein (common)~1/symant~1/virusd~1/20081126.307/cceraser.dll, DeleteCache5112" - all of course in German language... - Do I have to worry about this? And what can I do, if this is dangerous?

 

I m working with Windows XP.

 

Would be glad to get some help and advise from someone at Symantec. Thanks a lot.

 

Clerence