I had the same type of break where the transport and information stores refused to start after the business console was installed (v6) and the shields installed on the server. I opened a ticket and got a reply a couple days after the ticket was made :
--------------------------------------------
Dear customer,
We have received and acknowledge your issue. Now we will analyze whether there is anything related to avast! that we could change, and if so we will provide a work-around or fix it in a future release. We will monitor how often this issue appears in our customer base and the impact on our market. If you have any additional information about the issue please let us know because it could shed more light on the issue and help us to solve it or identify the cause more quickly. Thank you for helping us to improve avast!
Best regards,
-------------------------------------------
In the meanwhile client being unwilling to go 2-3+ days without email, We re-installed Win2008r2 +Exchange 2010 overnight at our costs(Thank God for backups and being anal about them). Needless to say both Avast and ourselves have lost a customer... There is no point in selling products for which we, the resellers, cannot have professional and prompt support as we carry all the burden of responsability onsite. - a forum and web ticket system is inadequate for resellers at the very least if not for any corporate structure + If the client sues my company for lost time and damages is Avast in Prague going to back me up, don't think so. So dissapointing.