Yes, I struggled a little there, too.
When you roll back driver in the driver tab of the network setting for the card tick the box 'delete drivers' or something similar. I cant check this wording as my rollback is greyed out now. By deleting the drivers windows will not load them again on reboot. I had to roll back and delete 3 times to get back to the original windows drivers. I couldn't find these original drivers anywhere on the web so this is the only way to get back short of reinstalling windows.
Note that the old windows drivers for me still have problems. I think it's to do with the firmware that would have been installed on one of the driver releases. I find N fine on a home cisco access point, but N fails and in fact B/G is also a problem on a TP Link access point. That's the one I use at work. It maybe over subscribed or just flaky in relation to the intel card. I work around with a USB wifi transceiver as per earlier posts.
I am actually waiting for a replacement card from EBAY ($25 Australian). I'll install that and throw the intel one away as this is such a big issue for me. The USB wifi is not power saving so not a long term option for a Samsung tablet. I hate to do this but I don't think I have a choice as there's no news if this issue will be fixed by intel or Samsung now or in the future. This means opening my Samsung 700T tablet but that's worth it for a stable roaming wifi connection with my tablet.
Hope this helps dude.
C-