How to make sure my PC is completely free of dns changers/viruses etc?

[Welka]

Today I was looking for a game demo of Dragon Age 3, and installed one I found on TheDemoBay. But it seemed very fishy to me, as it was supposed to be only 2.5GB and the exe itself was about 660kb big (while the regular game is around 35GB). And of course, after it finished "installing" - I'm not sure if it even installed anything as there were no folders in the destination - I found no traces of it, it wanted me to go online and download a txt file from the site and input the code from it into the app, after you filled out one of those scam surveys, which I didn't.

Now, I deleted the exe, but I didn't find any traces of the program, and when all items modified today via TreeSize, I couldn't find them. So I ran Malwarebytes Free and AVG Free while the laptop was offline, but they found nothing.

What else can I run to make sure nothing happened, and it didn't change the DNS servers, or install some kind of spyware, virus or something else? Hopefully it was just a scam that tried to take a survey and didn't actually change anything. Thank you!

 

[Callender]

With regards to DNS servers - run a scan with the software mentioned in this post:

A problem with Firefox on a used/rebuilt Dell Inspiron laptop

Make a note of your current DNS server settings (write down the numbers) and when the scan is running you will get asked at some point "did you install this server?" and if the addresses shown match your current settings choose yes. Otherwise choose no.

EDIT: You will get asked about any existing DNS servers if there are more than one detected.

When the scan completes view the report and upload anything of concern. As for repair - I'd suggest avoiding that option for the time being or only select individual items for removal if you are 100% sure that they need removing.

 

[Welka]

With regards to DNS servers - run a scan with the software mentioned in this post:

A problem with Firefox on a used/rebuilt Dell Inspiron laptop

Make a note of your current DNS server settings (write down the numbers) and when the scan is running you will get asked at some point "did you install this server?" and if the addresses shown match your current settings choose yes. Otherwise choose no.

EDIT: You will get asked about any existing DNS servers if there are more than one detected.

When the scan completes view the report and upload anything of concern. As for repair - I'd suggest avoiding that option for the time being or only select individual items for removal if you are 100% sure that they need removing.

Thank you!

I did some research in the meantime and found out the best thing is to run Rkill from bleeping Computer, then run Malwarebytes and Antivirus, although in my case Rkill didn't terminate anything, so I should be fine.

Also RogueKiller is a good app to run to check for any changes including DNS and proxy changes.

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