You have an annoying stuffty virus that has made itself trigger things when you launch blockland, along with other applications. It's not that blockland malicious, it's that a malicious program is trying to make itself untraceable by triggering through blockland. I don't know much about removing viruses, but do these things to try and figure out how you got a virus:
1. Check your history if you've been on any miscellaneous sites that you don't remember going to. These sites often show up, when you go on another less malicious that will open up another browser and, without your knowledge, download a virus of sorts. These sites are most often found when you try and download something from an indirect site, try and watch pirated movies, etc.
2. If you're running windows, do Window+R(Run) and type appwiz.cpl
Sort them by their 'Installed On' date and look for any programs or applications that you don't remember installing. If you do see something that could be malicious, google '[Insert Program Name Here] Virus?'. If there are results stating that said program is a virus, google 'How to remove [Insert Virus Program Name Here] virus'.
3. Restart your computer, and open up task manager(Ctrl+Alt+Escape). With Task manager open, click 'More Details'. From here, sort your Processes by name, and look for any and all processes that may be malicious. If you see something that might be virus related, right click on the process and then click 'Open File Location'.
If the folder directory isn't located in something that you recognize, it's probably a virus, so search the process name or the folder directory name on google to see if it's a virus.
If all else fails, and you can't locate the virus, or you can't remove the virus even after you located it, then you should factory reset your computer. Unless you have terabytes of files on your computer, then it should be fairly easy to backup your files on a USB or something, and factory reset. It may be a pain to get all of your files back, or get your computer back to how it was before, but it's better than living with a virus.
