Apologies. I have rerun the two tools, this time ensuring that the antivirus (Comodo) is turned off, together with the firewall and the sandboxing. I attach these new files. I have now discovered that I cannot run IE8, failing with a message iexplore.exe - Ordinal not found The ordinal 410 could not be located in the dynamic link library urlmon.dll. A search for this using Agent Ransack gave the results in SearchResults.txt. I have also done a full system scan using a Comodo Rescue disk. This scan gave a negative result, nothing found. attach.txt CheckResults.txt dds.txt SearchResults.txt