After a motherboard failure I have had to reinstall QGIS Dufour on a Windows 7 laptop. As I share data with a desktop machine I use LiveDrive briefcase as a virtual drive. With all versions of QGIS I have always been able to access LiveDrive which appears as a mapped drive M: However, on this laptop, having installed PostgreSQL, PostGIS and Osgeo4W shell to be able to load MasterMap data using the Astun Loader Astun Loader I am now unable to access drive M: from QGIS, GRASS or SAGA. I did have some access issuses and I had use 'run as adminstrator' to get round it even though my account has administrator rights. I have tried doing a complete reinstall of QGIS without success.
I don't know whether this a QGIS issue or not. Any suggestions to fix this are welcome.