First of all saying your some type "Computer expert" is a huge sign of a troll. Second of all putting all your settings on high is not Malware* but being irresponsible and pushing your computer beyond its limits. Optifine is in no way a virus and cant hurt your computer unless your irresponsible with it. And finally the definition of a virus is a piece of code or software that is able to duplicated it self and corrupt/ stealing computer data. Its not something you need to use on yourself. Now if you thought it was a good idea to download something that claimed to be "Optifine" off some sketchy website, then maybe it could be a real virus
