ok I don’t think avast will detect this anymore and we’ve cleaned your computer in the same time 
I am showing a system idle process using 99 % cpu. Any ideas? Under user SYSTEM
I also have a file in malwarebytes in quarantine named PUP.Optional.OpenCandy can i delete it?
which name of process uses 99%
yes you can delete it
Thank you so much for all your time and help ;D
My system is back to running fast again. Your the best! 
It did not more arrive ? => process uses 99%
if it’s ok :
Final cleaning disinfection
To clean tools and better secure your pc I invite you to follow this tutorial for the final.
It includes:
cleaning after disinfection
updates to address security vulnerabilities of important software not updated
and finally some tips to follow so that protection is more effective
Choosing a Secure PDF reader
Adobe Reader has become too unreliable, I advise you to uninstall and pdf reader, I suggest using SumatraPDF
https://kjkpub.s3.amazonaws.com/sumatrapdf/rel/SumatraPDF-2.4-install.exe
think of the installation, check the box that corresponds to “use SumatraPDF as default player” and “install plugins” in the options.
FlashPlayer
if this is not done , update Flash player (for Chrome is already included):
for non-IE:
IE:
Clean tools
Download http://www.aht.li/2115988/delfix.exe
Throw it and configure it like this:
[img]http://security-helpzone.com/gen-hackman/wp-content/uploads/2013/07/delfix.png/img]
This will go very quickly.
Then post the contents of C: \ DelFix.txt
You can then delete DelFix.
Securing PC potentially unwanted software, toolbars, etc …
When you are on Windows and we love installing a bunch of strange apps, you have to keep vigilant. Indeed, some programs offer install during the installation of toolbars and other adware that will be difficult afterwards to remove from your system.
In general, we pay attention, and uncheck the boxes that are going well, but just once, a little bit of bar and lets the fatal toolbar.
But a little app can do the job for you
Download: http://unchecky.com/files/unchecky_setup.exe , a service that runs in the background in Windows, which automatically detects the additional software in the installation program and uncheck the boxes need to avoid to pollute.
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domwnload SFGTC From this link :
http://www.archive-host.com/link/646ee87189ae1799b4161baf55b5a59560933f83.exe
run it , let it calculate , and click GO
It’ll clean all the temporary files in your computer