rwittGeneral things to check: - Do the agent logs or agent event logs have any clues? No, cause it happens with different machines - Is the patch source set correct (if you are using a local server)? No, we're using the original download from internet (there aren't local servers for downloads or proxy servers) - Is the user credential correct and an administrator on the box? YES - Are other patches failing on the box (to determine if this is a SP2 specific issue) No, till this moment - Can you manually install the patch on these machines you are having trouble with? This is exactly the problem, if I try to install "manually" (downloading from WUpdate and installing with Kaseya Service running) it will not run. Thus if I try to install the SP3 from the "pacth manager" tab in Kaseya the result is the same installation begins and 2 minutes later it says that installation patch failed