Marjo, so I understand you are using the latest Windows* 8.1 drivers. If you are not using Intel® drivers or Intel® Proset then the issue is related to your operating system or Microsoft* driver and therefore you may contact them.
We will be releasing a compatible driver for Windows* 8.1.
You guys have 8.1 Drivers already, I've downloaded, tested them (someone here gave me the link because I couldn't find it myself, they aren't in the download list at least then), and he's right, the driver both loads really slow and a webpage will take like 10 seconds to load when normally it takes 1 second.
Something is wrong with your 8.1 drivers, let alone the dropping issue on all drivers.
Man, it's like you don't even know your own services.
The driver is 220.127.116.11, provided by Intel from windows update. I did try the previous driver and Intel software but same issue.
Such driver is not yet publicly available since it has not been officially released. Please also note that Windows* 8.1 is still a preview at this time.