Winaso is a sound product and has served me well over the years.
As the trial will only repair 10 errors at a time it can become a tiring job to rescan and repair.The paid version will repair all in one click.
Ccleaner is free and does a similar job.
Winaso is a very good product that goes a little more in depth than Ccleaner and has a few more functions.
If you are looking for a paid version registry cleaner,then my best advice would be to pay for Registry Mechanic® 8...possibly the best reg cleaner out there.