Problem with File Manager

[Deepak1]

There is this icon constantly flashing on my screen when I go to File Manager. I believe it's a bug which has erroneously creeped into my phone. I am not able to remove it using my avast mobile security. Whenever I click on the sub-options inside file manager (e.g downloads, my device etc) an ad flashes intermittently or I get redirected to a google play store page for downloading an unwanted app. I believe it's my phone manufacturer's mischief. The problem is I don't know how to get rid of it. My phone is Lenovo tab4 8plus. I can attach screenshot if option to do so is provided. Please help.

 

[B. Diddy]

Which file manager -- the preinstalled one, or a 3rd party one?

It would help to see that screenshot: http://forums.androidcentral.com/ge...ide-how-post-screenshots-android-central.html