You do not just want to turn them off. They are on for a reason.
ABS on solid means your ABS is currently inoperable.
Most ABS issues are usually the speed sensors. Basically each ABS wheel has a speed sensor. If the sensor sees your wheel not spinning, but your computer says you are moving the ABS kicks on. An issue can arise if the sensors malfunction, thinking your wheel is not spinning and therefore kicking on your ABS when in fact there is no need for it. Somehow the system can detect this kind of fault and will throw the light and kill the ABS until fixed. I could be wrong but I think it detects by knowing you are not braking, are moving, yet the speed sensor reports a stopped wheel....
Long winded, I know.... So here is a question.... Just prior to your light coming on did you notice your ABS kicking on under normal braking conditions?