Windows 10: how do I know when the trojan virus was succusfuly removed from my computer??

Recently I had a trojan virus installed on my computer. I went through every step required to remove it such as changing all my passwords and of course running scans by both Microsoft defense scanner and Malwarebytes to eliminate the virus. Microsoft's defense scanner found viruses and threats and said it was removed. After that, malware bites found 2 other smaller things not as severe I suppose. Lastly, as a side note, my Instagram remains hacked due to the trojan, and earlier on, the trojan was able to get access to my amazon account in an attempt to steal money however the amazon was fixed,

:)