If this topic has been addressed before....sorry. We are new to the Forum. We have an office with 4 computers. 3 of them have BitDefender Antivirus installed on them. The 4th machine, our internal server, also hosts Quickbooks. When we tried installing BitDefender on the server (about 15 months ago) we couldn't get QBs to function properly. So we re-installed Norton. It has worked well for the past year. About 2 weeks ago we installed a new version of Norton (2009) and we have had a lot of internal network problems since then. We would like to install BitDefender as our antivirus program but are concerned about the past problems we had with QBs. Is this a problem anyone has heard of? If so, any work arounds, fixes we should know about? Has BitDefender solved this? Is there a different BitDender product we should use (Security?) Thanks for any help or experience anyone can share with us regarding the use of BitDefender Antivirus and QBs.