It as occured in various games. always the W key which leads me to believe that
over use of the key with other factors causes this problem.
unplugging keyboard, restarting computer, making sure the keyboard is not low battery, along with time, seem to fix it at least for a few days if I am lucky.
I should get a new keyboard but my old one is really good one (was about 70 bucks) and I don't want to splurge.
thanks for responses!