Browser forcefully opening ads

[Syed_Jlaluddin]

I installed a software. It installed correctly but after this my browser is showing ads on every website (also on ad free websites). I uninstalled that software but nothing works

 

[Wolfshadw]

Scan for malware/viruses.

-Wolf sends

 

[theyeti87]

What is this software you installed? It sounds like malware.

 

[Solandri]

A lot of "free" software makes money by agreeing to sponsor other software (like browser extensions or adware). Basically, every time the free software is installed, the malware gets installed with it, and the malware author pays the free software author.
Edit: Also, some download sites (like CNet) do this by wrapping free software in their own installer which installs this malware. Instead of the free software author being paid, the download site gets paid.

To avoid this, never use the automatic install. Always do a custom install. Usually that will bring up a step where you can choose which components to install, and the malware will by default be selected to install. Unselect it.

When you uninstall the software, it does not uninstall this malware because it was installed as a separate program (you "agreed" to install it by choosing the automatic install). So look through your installed programs list for something you don't recognize that was installed recently (sort it by date), and uninstall it. Also look through your browser extensions, toolbars, and add-ons for something you don't remember installing, and delete it.

Finally download Malwarebytes and run it. It's pretty good about catching most malware.
https://www.malwarebytes.org/mwb-download/

 

[exroofer]

1) Install Firefox.
2) Install Noscript plugin for Firefox.
3) Install Adblock Plus plugin for Firefox.
4) Never have this happen ever again, unless you deliberately ignore the warnings from 3 level deep security.

I am not a Chrome user, but I understand similar options are available for it, perhaps another person could list those options for the OP.