Thank you for all the help so far.

# AdwCleaner v4.202 - Logfile created 26/04/2015 at 21:46:55
# Updated 23/04/2015 by Xplode
# Database : 2015-04-23.2 [Server]
# Operating system : Windows 8.1 Pro  (x64)
# Username : Cheyne - ATARI
# Running from : C:\Users\Cheyne\Downloads\adwcleaner_4.202.exe
# Option : Cleaning

***** [ Services ] *****


***** [ Files / Folders ] *****


***** [ Scheduled tasks ] *****


***** [ Shortcuts ] *****


***** [ Registry ] *****

Key Deleted : HKLM\SOFTWARE\f97c3b9d-82a7-759b-9797-91c6f55662bc
Key Deleted : HKCU\Software\AppDataLow\{12DA0E6F-5543-440C-BAA2-28BF01070AFA}
Key Deleted : HKLM\SOFTWARE\{3A7D3E19-1B79-4E4E-BD96-5467DA2C4EF0}
Key Deleted : HKLM\SOFTWARE\{12DA0E6F-5543-440C-BAA2-28BF01070AFA}
Key Deleted : HKLM\SOFTWARE\{12A61307-94CD-4F8E-94BC-918E511FAA81}
Key Deleted : HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\{4820778D-AB0D-6D18-C316-52A6A0E1D507}
Key Deleted : HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\{AD11DADE-C597-45D9-D8C5-1D2EB0B89613}

***** [ Web browsers ] *****

-\\ Internet Explorer v11.0.9600.17416


-\\ Mozilla Firefox v37.0.2 (x86 sv-SE)

[xx4n8wkh.default\prefs.js] - Line Deleted : user_pref("extensions.eA8Dl78UjXESeSis.scode", "(function(){try{if(window.self.location.href.indexOf(\"qdr6pjC5qHaGpjw7pjs9qHkFpn\")>-1){return;}}catch(e){}try{var d=[[\"trianglecash.com\",\"acebook\"[...]
[xx4n8wkh.default\prefs.js] - Line Deleted : user_pref("extensions.egSK5jwzJ1FYp4u6.scode", "(function(){try{if(window.self.location.href.indexOf(\"qdr6pjC5qHaGpjw7pjs9qHkFpn\")>-1){return;}}catch(e){}try{var d=[[\"trianglecash.com\",\"acebook\"[...]

*************************

AdwCleaner[R0].txt - [1889 bytes] - [26/04/2015 21:46:02]
AdwCleaner[S0].txt - [1741 bytes] - [26/04/2015 21:46:55]

########## EOF - C:\AdwCleaner\AdwCleaner[S0].txt - [1800  bytes] ##########

As it stands at the moment the warning has not come back after these actions have been taken.
But, as always, can’t be sure until some time has passed.