Tried to upgrade to exchange server 2010 sp2 and after a reboot our exchange server was no longer on our server running 2008 r2. I can locate the files in the directory we installed to, but there isn't anyway to get it running. Under the start menu exchange server folder is completely gone as well. I can locate the mmc but it will not operate correctly either. When i go into services all of the exchange services are disabled and when setting them to automatic start up I can not initialize them. They all fail to start with an error. We have tried re-installing but get an error saying it cannot locate original set up location or something to that effect. We then tried deleting the registry entries to maybe remove any trace of exchange, but that didnt work either. At this point we are really clueless as to where we need to go from here.