Problem: How to polyurethane a floor
Choose water-based polyurethane for a faster drying time.
Water-based polyurethane looks milky in the can but dries to a clear finish. It also has a low odor and dries more quickly than oil-based polyurethane.

Answer: If you're hoping to complete this project in one day, water-based polyurethane is the way to go. Select oil-based polyurethane to add a deeper hue to the existing wood.

Problem: How to identify and resolve hardware failure issues
Try to identify bad sectors.
Bad sectors are sectors on a hard drive that can no longer be used. This may be due to permanent damage or the inability of the os to access them.

Answer: If you find your system freezing, getting stop errors, or other errors this may be due to bad sectors. Use chkdsk and repair these problems.

Problem: How to prevent tartar
Brush your teeth at least twice a day.
In order to remove plaque from your teeth, and in turn prevent tartar from developing, it's important to brush your teeth. Brushing twice a day is recommended to keep plaque and tartar at bay.
Answer: Typically, you should brush your teeth in the morning when you get up and in the evening before you go to bed. However, pick a brushing schedule that works for you and stick to it.