This is what I tried, unistalled CMBB, restart, used system mechanic to remove any references of CMBB, restart, removed any references to CMBB or the patch from "Windows\Prefetch", restart, fresh install of CMBB (no other progs running) then install the patch. At the mo this seems to be working.
On a side note many, many thanks to Schrullenhaft your help was very welcome. Cheers mate