I accidentally installed an execution file with HackTool:Win32/Crack!MTB maleware in it and my anti viruses probably aren't getting rid of the malware.
A detection of that type does not necessarily mean that you have any malware. If you download a tool to crack a game or app, that tool may be perfectly safe. That is, it does nothing more than crack the game, but AV software, such as Windows Defender, will still detect it as a "HackTool" (possibly to discourage software piracy). Also note that downloading cracks can be a dangerous activity because the sites where they're found often include phishing ads (e.g. fake "you've been infected" pop ups) and it's also possible to download a crack that's been modified to include a malware payload. If you allow such a modified crack (via UAC) to run, then it also has rights to deploy its payload. Be very careful about where you get these tools.