BSOD with Iris iXBRL report production

We are currently using 10.6 and have had the re-occurrence of a practice stopping issue, We use Accounts Production/Business and Personal Tax modules)

Earlier in the year (April) we had the situation on the majority of our standard Dell Optiplex Vista desktops that at the point where the report creation screen moves from the question dialogue boxes to the report screen each workstation would Blue Screen (commonly known as BSOD)

Following advice from Iris Support (they believed it was a hardware issue) we added new video cards on all the machines but this proved unsuccessful.

Then a member of staff created a new client and new set of accounts on a machine with the standard integrated Intel graphics and the iXbrl report was created properly (the practices' first).Running this report again on the rest of the machines worked and until last week everything was fine. It seemed this new company had somehow "cleared" a data issue that had been causing the BSOD's, though nothing unusual was reported by Iris's support when I sent them the data.

Last week though the Blue Screens came back, including on the one machine that has always worked, we tried a new company to no success.

Iris is running on Microsoft Small Business Server 2008 R2 with SQL 2008 Express, following Iris support's advice I tried, somewhat reluctantly, to run Iris workstation software on the server, the report production worked and I stopped panicking about a BSOD on the server (hate to think what would have happened to Exchange and TAS and the file store).This takes us back to the 12 identical workstations.

The only changes between April and last week would have been Microsoft Updates and AV definition updates.

At this point we are stuck, Iris support doesn't seem to have any further answers and I was wondering if anyone else has had this sort of practice stopping issue and had a solution?

TIA

Paul