How to backup before using CCleaner

Back in the old days data was not as hard to preserve, however hard to distribute. Nevertheless, if papers were stored at the right temperature and written with the right pen, there would not be the problem of data loss but if hazards should occur (fire, flood etc). Nowadays, things are a bit more different – in other words, data can be easily modified under the action of viruses, worms, remote access and so on.