Zwift doesn't work on pc.

Hello 
I’ve downloaded zwift without problems but when i want to start the program i het this fault:

Your intel HD graphics may be to old (version 3040)

Now I did the intel scan and my pc is up to date and has this specs:

TOSHIBA SATELLITE C55-A-18H 
Operating System 
Microsoft Windows 8 (64 bits) 
Processor 
Intel® Core™ i5-3230M CPU @ 2.60GHz 
Graphics 
Intel® HD Graphics 4000 
Audio 
IDT High Definition Audio CODEC 
Intel® Display Audio 
Networking and I/O 
Qualcomm Atheros AR8172/8176/8178 PCI-E Fast Ethernet Controller (NDIS 6.30) 
Realtek RTL8188E Wireless LAN 802.11n PCI-E NIC 
Memory 
4 GB 
Storage 
TOSHIBA MQ01ABF050

 

I’ve found this on the zwift site that my pc needs this: 

OS: Windows 7 x64 bit, OSX 10.8 
Processor: Intel Core 2 Duo 
Memory: 4GB 
Graphics: 1GB dedicated GPU, or embedded Intel HD 4000/AMD R5 
Hard Drive: 4GB of free space

I’m not a pc geek so does somebody now what is wrong?

Thank you for te help!

You need to make sure that the video card is fully up to date, here is a link to download the driver: https://downloadcenter.intel.com/product/81499/Intel-HD-Graphics-4000