AVG and Salesforce.com

While using the Salesforce.com reports section when trying to download reports to XL, a file is downloaded but contains no records when opened in XL. If I temporary disable AVG Antivirus the report downloads a file and can then be opened in XL.  Running XL 2013 and is has all it's updates.

Hello Garry,

We are sorry for the inconvenience caused.
May I know the name of AVG program installed on your PC and is it free, trial or paid version?