I have tried safe mode with system restore turned off and the result is exactly the same on reboot the .exe file is trashed. The system now nolonger runs all the start up items and fails to start NOD32.
All my problems started when I upgraded to the registered pro version of sas from the trial version. By the way the trial version showed no trojans or a tracking cookies on the last scan before the upgrade.
A NOD 32 system scan shows no virus or trojans so unless i can create a boot disc that will run sas i have the feeling I am snookered.