Black Screen after I click the login button [client]

Just happened today I didn't changed anything in my laptop from yesterday on.

I tried a couple of mentioned things online:

• Disable display scaling on high DPI
• Updated to the newest Geforce driver
• Run as 640x480
• No proxy set in IE
• Security Settings in IE as medium/low
• Use Google's DNS 8.8.8.8 and flush dns afterwards

Setup: Windows 8.1 Pro - 64-bit Intel Core i5-3317 Geforce 635m Asus Laptop

It just doesn't want to work. Let me know if there's anything else, or what you need from me.

Best, Albaniax