Have recently installed SBS 2011. When i tried to run a full backup got an error that there was not enough space available. After doing some research discovered that this is due to the system reserved partition 100MB only having 38MB of free space. I have Bit Defender Business AV also installed and people have said that this is one of the causes. I have tried to disable the USN Journal but it keeps enabling itself after restart. It seems as if the only way is to increase the size of the system reserved partition, bloody Microsoft. Please can some tell me how to do this other than having to purchase 3rd party software.