If it's a Local script:
Click on the windows button
Type "scripts"
Click on the folder
Drag the Jar file or extract the the .rar file into the folder.
Click refresh or reload your bot client. ;)
First of all. OSBot wouldn't of given you any Viruses. Also,could you elaborate on how you're having problems extracting files? The Bot is a .Jar file. Do you mean scripts?