malware/ trojan attacking browsers

Sorry - have been AFK. Yes, rename them - that will prevent them from executing.

phant0m2017 said:

Please ignore the last post . I left the scan running throughout the night not realising I had to give permission for the toolkit to rename the infected file... I'm now running it again

Okay, no problem. So, rename the files with the Sophos offline scanner.

Once finished, I would boot into safe mode and reset all browsers on the system - whether you use them all or not.
Reset Edge
Microsoft Edge - Reset to Default in Windows 10 - Windows 10 Forums
Reset all other browsers
How to Reset Your Web Browser To Its Default Settings

Then I would boot into normal mode and run RKILL. RKIL will stop any malicious processes from running until a reboot. Everything RKILL does is undone by a reboot. When it's finished, it will show a log - might want to post that here.

Then run (scan then clean) ADWCleaner. ADWCleaner will reboot the machine to finish the cleaning. If it found anything, please post the log(s) C:\AdwCleaner\AdwCleaner[C1].txt. [C2].txt, etc.

Then run JRT.

Boot back into the normal boot mode of the operating system, run this:
Malware Clean Up Tool | Breach Remediation with Sophos Clean

Let's see if that finds any leftovers. Then try the browsers.

phant0m2017 said:

Okay .. I'm going to the Sophos kit once more .... is it possible for me to reset all my browsers while in safe mode off line ?

You mean Safe Mode without Internet? I believe so, but if you find you're having problems resetting them all, you also have the option for Safe Mode with Networking, when rebooting into Safe Mode.
Remember, you want to reset all browsers on the system - not just the one(s) you use. Edge and Internet Explorer come with Windows 10, and will be infected, whether used by you or not.