Run OSGeo4w.bat in QGIS install folder run
qgis --noplugins
qgis --configpath C:\temp\qgis --optionspath C:\temp\qgis
This will make a new folder in C:\temp\qgis wtih new QGIS setttings,etc and also what is normally found in .qgis2
Run OSGeo4w.bat in QGIS install folder run
qgis --noplugins
qgis --configpath C:\temp\qgis --optionspath C:\temp\qgis
This will make a new folder in C:\temp\qgis wtih new QGIS setttings,etc and also what is normally found in .qgis2