Flash Player Auto-update problems

Hi,

In our environment we have Win 7 64bit Pro PCs, IE10 and users are NOT administrators.  We install Flask Player 11.8.x using the MSI silent switches, with the autoupdate service disabled, the scheduled task for auto-update deleted and the MMS.CFG file configured to AutoUpdateDisable=1.

My current problem is that some users have now been prompted to upgrade their Flash player.  This occurs during logon with task manager showing "FlashUtil32_11_8_800_168_ActiveX.exe /update activex" as an active process.

Does anyone have any ideas as to what may be causing the autoupdate?  IS it possibly casued by Internet Explorer initiating the ocx? Any ideas welcome.

Many thanks in advance,

Andy