yeasterday I installed Lubuntu on the laptop of one family. They had already Windows 7. I shrinked one of its partitions, so that I could free 40 GB and I installed Lubuntu on it. When I was there dual boot was working perfectly.
This evening they phoned me that when they start the computer its slowed down and freezing, so I will have to go to them and repair it. I haven't seen such a problem so far. Could you help me how to solve it?