First post here, so please be gentle!
The issue is as follows:
A friend's PC (Windows 8.1) has been infected with a bunch of malware, which caused a lot of problems (no task manager, no command line, etc). The steps I have taken up to now, were these:
0) Uninstalled recently installed and/or suspicious software.
1) Tdsskiller: It removed a rootkit
3) Spybot S&D
All the other programs removed various other malware from the program, with SpyHunter (which btw I have found to be one of the more effective programs), removing the final two.
In addition, I have issued a browser reset to chrome, which is my friends browser of choice.
Despite all these actions, when I try to use chrome, for example by initiating a google search, a bunch of windows pop up, along with extra google advertised results, which have a border stating "Ads by Sonic Train". All the guides I have been able to find regarding "Ads by Sonic Train", do not apply, since they either mention anti - malware software I have already used, or steps that I have already taken.