Hi Danna
From what i can make out from the Avast scan it is detecting Deckard System Scanner,not to worry they are safe and we`ll remove DSS at the end.If you can post a screenshot of the Avast scan that would be better.
As for Win32:CTX that file belongs to Panda active scan and is harmless,can you post the exact location of the gamesetup.exe file and is it still present.
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Open HijackThis and click on 'Do a System Scan Only'. Check the following entries
(If they still exist, make sure you do not miss any)
O2 - BHO: (no name) - {7E853D72-626A-48EC-A868-BA8D5E23E045} - (no file)
Please remember to close all other windows, including browsers then click Fix checked.
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You don't seem to have a firewall program installed. Using a firewall will allow you to give/deny access for applications that want to go online. Select one of these, or another of your choice:
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Open HijackThis and click on 'Do a System Scan and save a Logfile'. Save the log file and post it here.
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Log Required
Hijackthis log