I've had this when clicking the link to the Twelve Labours General Discussion and again when I clicked the Weird Redirection thread you see in the image. Instead of opening the link, a download called OOC starts.

I also had something downloading when I logged in, but I cancelled it without taking a screenshot and when I clicked a link it turns out I was logged in, even if pressing the login didn't seem to do anything but start that download.

I have no issues with going to my pm's, or clicking on a category in the forum, but when I click a link to go into a thread I usually get that OOC download that starts.

Using the arrow at the right side to go to the last post in a topic doesn't give a download, only clicking the link directly does that.

I'm using chrome and a Bitdefender quick scan doesn't give any issues. I did a CCleaner today and I can do an additional deep virusscan tomorrow, but I don't know if it's something on the site or malware from me. I don't seem to have issues like this on other sites. 

[img]https://s24.postimg.org/xujt9r8xh/chrome_download.png[/img]


Edit: 
Additionally, when creating this topic I got an error page, but when I checked though another open tab, the topic did get created:
[img]https://s24.postimg.org/6rspa1wmt/foutmelding.png[/img]


Edit 2:
Clicking the subscribe button also gives this OOC download, but checking my subs I am subscribed, even if the green button doesn't change to the red unsubscribe. Unless I return to the thread through my subscriptions, using the arrow, because clicking the link directly from my subs gives the same OOC download again.