Hello all, I have done quite of bit of experimental research today with my service acounts / NTFS permissions. I was able to pinpoint and reliably reproduce the change that breaks Apache, but I do not yet know the exact cause. In the guide linked earlier in this thread, it is recommended to "Deny All" permissions on the OS drive. That is the point at which Apache reliably stops working. Mysql service will still start successfully, but not Apache. I can remove the Deny permissions on my OS drive and it will immediately work again, like flipping a light switch. Thoughts ? -Clint