The system can not FIND the file specified (2)

Hello to all!

From the day 11/04/2013 avast my small office administration of win2008 R2 server is showing the message “The system can not find the file specified (2)” whenever I try to insert a new computer network manager avast, everything was working normally 100% on two servers, however now I can not insert any more pc in either servers

already uninstalled, reinstalled and the problem continues!

is there any solution for this?

thank

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