I don't know if that will work as you have already tried to download rkill but were unable to and that is one of the steps in the bleeping computes instructions.
I was able to download it but wasn't able to run it because system tools was stopping it from running, but i'm in safe mode at the moment, which is also one of the steps from bleeping computers
Edit: Was just reading over the steps that bleeping computers has and saw this:
This infection changes your Windows settings to use a proxy server that will not allow you to browse any pages on the Internet with Internet Explorer or update security software. Regardless of the web browser you use
But I can still use Firefox with no problems in safe mode and normal, so if I did do that guide would it be best just to miss the steps for that? (won't do the steps on bleeping computers until instructed to do so)
Also if System Tools came through Java, does that mean Java is infected too? or did it just use an exploit/back door to install on my computer? Because I would like to go on mibbit (irc java client) to let people know what's going on