Since late January this year, all attempts to run a manual full scan on my Acer Aspire, Windows 7 OS, have failed with Windows shutting down abnormally, usually (from what I can make out by monitoring the scan manually) round about 440,000 files scanned. The problem occurs under normal mode and under safe mode. I have uninstalled and re-installed Norton a number of time, to no effect.
Other security software on the computer is Malawarebytes, SuperAntiSpyware Free, Spybot S&D, McAfee Security Scan Plus and Sophus. In the past with these installed, there have been no problems in running a full Norton scan.
Any help/advice would be appreciated.