Saving Sidekick

When I start the Chrome at my PC, I got a warning about a malicius saving sidekick extension. I alrready tried to scan with Avast Internet Security, but it didn´t found anything.

In my LapTop I export the favorites and removed the Chrome, after that I reinstall again. There are another soluction??.

In other hand I couldn´t Upgrade the Windows .Net Framework 1.1 SP1 (BB2833941). Is it some kind of Virus ??

I attached some warnings

Try out AdwCleaner to remove Junk from browser: http://general-changelog-team.fr/en/downloads/finish/20-outils-de-xplode/2-adwcleaner

The AdwCleaner recommended by Steven Winderlich have a Bug in line 3163 " Variable used without being declared".

The AdwCleaner recommended by Steven Winderlich have a Bug in line 3163 " Variable used without being declared". Then it didn´t work.