Low RAM memory, activate SWAP on USB stick, or on HDD if you don't have one (it's better to use USB flash, 256 MB SWAP)
Thanks for the reply. I had created a swap file previously for 128 MB on USB, but on checking, it had disappeared, the box was not recognising that there was a USB connected.
I reconfigured and created a new one for 256 as you suggested. I was also having trouble with downloading Crossepg so I presume it was down to the same USB issue.
My RAM has always been at around 95-97% so I will look or other ways to reduce it aswell.