I am getting an error trying to update my android packages.

It is saying momentarily deactivate your antivirus software. --I am not using any anti virus softwares.
Please close any programs that may be accessing the directory.--I haven't kept the directory folder open.The only program that might be accessing it might be my adb in eclipse.
I am currently using android 2.3.
Can you tell me what is the problem here.How can i resolve this
