Won’t boot and acces BIOS after crashed Windows7 Update

Hello Mates,

Had my Asus g75vw offline for 2 weeks, when it came on last night there were 8 Windows updates. Download, restart.

After startup it shows this ‘configuring updates’ but takes unusual 20minutes so I thought its frozen. I turn it off manually.

I turn it on and… nothing. Black screen. I cant access bios and Windows is not loading. I can see the battery is on for some time and turns off itself after 10s or so.

Any ideas what to start with?