Also one of my favorites and also from my mate from down under @frogboy privazer for more privacy and indepth cleaning ; privazer ; its free and does a better job than most paid products
since you download malware samples it is Better to use atleast one on demand scanner like malwarebytes or reasoncore or emsisoft kit and one more browser
Let's go for practical which you may access on demand scanners at anytime so highly follow the suggestions. You may place others through USB/External HDD.
Optional suggestion: You may add a password manager to store information securely and a backup browser just in case.
Are you running Windows?
What operating system are you using?
x86 or x64?
Computer knowledge?
Last know Malware infection?
Malware samples & phishing sites?
Number of users on your PC?