Hello Gary and thanks for your reply.

That did not help. It's not only a problem with installers I download, some programs I already have are not opening anymore, and when they open they close...

Hello eveyrone,

So, for the past 2 days my pc is displaying an unusual behaviour. Every installer that I download does not work.
Some programs like uTorrent or Dolphin or Hijackthis don't work. I...