Launcher Blue screen

The bug is when i start the launcher (battle net app) it logs in but the launcher is constantly blue screen and my mouse pointer keeps showing loading. Can’t seem to make it work, i looked around the web for a solution but found none. Everything thing was working fine untill i updated my graphics drivers and now it does not work…my specs are
Windows 8.1 64bit
Acer aspire v3 572G
Intel i5 4210U
8Gb ram
Nvidia GeForce 840M

Please get back to me on this I’d really like to play some Hearthstone again! Regards