Do not delete does files, they are really important for your pc to work.(this is why they are hidden).
For example Recycled is your recycle bin. Config.sys is one of the three most important files on your hard drive it permits booting up your pc(with command.com and autoexec.bat). Io.sys permits i/o(input and output).
If you want your PC to work, do not delete these files.
In ancient times they had no statistics so they had to fall back on lies