If you have water (condensation) running down the outside of your windows then this would be normal particularly if it’s a cold day. When you breathe moisture in your breath will condense onto any cooler surface and this includes your double glazed units. Increasing the ventilation in your room should help.
If on the other hand you mean you have water inside the gap between the double glazed units then the units have failed and require remedial action. Contact the installer immediately and let them have a look. Normally this means the double glazed unit will need replacing but it is not a big job and hopefully the unit will still be under warranty.