I use this software in ages. Formerly known as freeware and now that. There are many suppliers of software of this kind. Probably very many that are better. If you like this look for packages and buys, then you will find that the price-performance ratio is optimal, at least for me. The disadvantage of this software is that you at a thinning of the computer (user defines determined time fixed), depending on the disk size, the time it takes. I have 3TB and let my older computer overnight (1x per month) work. Otherwise, a monitoring is carried out during operation. I've been using the Si software AVIRA (see above), never had an infection of your computer. There is also the possibility to solve by means of the support infestation of viruses.
