ABS and ESP warning lights !!

Hi guys

While driving home this evening my ABS and ESP lights came on. I stopped the car and restarted and they have gone out. I drive a 2002 4x4 Octavia. My question is, do I loose my four wheel drive if the warning light is on ?? As you can imagine at the moment my car has been performing great in the snowy conditions but I wouldnt like to think that at some point I will not have four wheels driving especially if the warning light comes on half way up a snow covered hill !

Cheers.