Material in viewport becomes grey?need help

Support Materials and Textures
1

Hello…so what happen in here im trying to do some work…but my file suddenly becomes “Grey”…i thought that file is corrupted but then i open my other file its all the same…even the material preview of a default cube

Screenshot 2021-01-09 183036
Screenshot 2021-01-09 1830361366×768 143 KB

even in render image …the material becomes transparent
i tried export as Fbx into Unity, its all Ok but not in Blender…did i mess any setting??

2

So untouched old files have the same problem?
Where there a gfx driver update? Try reset to factory settings and see if its fix this.