GBdialer, Services.exe, Access Members Area - URGENT PROBLEMS!

I have a very big problem concerning some spyware, trojan, virus or something else on my PC... I'm not quite sure what it is. I will describe the problem below:

A couple of days ago I let a friend use my PC so he could get some information off the internet but it appears that he went on more than just an information web site if you know what I mean

After returning to my PC I realised that there was a new dialer in my 'network connections' folder named GBdialer... I managed to get rid of this via manually deleting it but I think it may have left some things behind as I have also been left with an icon on the desktop named 'Access Members Area' which cannot be deleted. I have tried many removal processes such as Mcafee, Norton, Spybot, Spysweeper & Ad-Aware!

These have not managed to find anything whatsoever on my PC as I perform regular sweeps with these programs. Although they did not manage to find anything I have still been left with this icon on my desktop. I have tried manually deleting this but just come up with an error message which reads 'Cannot Delete Access Members Area: It is being used by another person or program. Close any programs that might be using the file and try again'

Because of this message I tried doing exacly what it suggested by opening task manager and going to the processes section. When I got to this section I realised there was a new process which I had never seen before called 'services.exe'... I checked up on this with Google and found out that it was a trojan. So i tried to cancel the process so that I could delete the desktop icon but an error message came up which read 'This is a critical system process. Task manager cannot end this process'

I would be extremely grateful if I could receive any help on this matter as this is my last resort due to searching the internet for 5 days now for ways to remove this threat... Thanks in advance for any help I may receive!

 

This problem has been sorted now so there is no need for anyone's help!! I appreciate it if anyone did infact think of helping me though!