Hi Respected Members, Today i have faced one problem with Avast IS 5 and SandboxIE 3.442, whenever i try to run firefox under Sandbox, my SandboxIE automatically close and delete the firefox from the sandbox environment. What i have noticed that whenever i set a parameter in Sandbox that none of the program except IE 8 and firefox can connect with Internet, then this thing happens. But when i remove this parameter then everything works fine. I guess its Avast Web Shield which is causing this problem. Is anybody here who can re-produce this thing in their test PC? Or does anybody faced this problem? Requested to please let me know...And any suggestion for me is also highly appreciable.