Is your swap file usage very high ? (Logging & reporting > Hardware > Memory usage - Daily)
Eventually sophos's support dialled in and increased the swap file from 1 to 2 gb
Apparently the ram was underspec and over utilised causing exceptional swap file usage. Unfortunately there was not enough swap so it locked up until it had caught up.
Is your swap file usage very high ? (Logging & reporting > Hardware > Memory usage - Daily)
Eventually sophos's support dialled in and increased the swap file from 1 to 2 gb
Apparently the ram was underspec and over utilised causing exceptional swap file usage. Unfortunately there was not enough swap so it locked up until it had caught up.