Accidentally downloaded malware

I believe I was fooled by a Phish that looked like it was from Bank of America. It said I needed to download a Security Certificate to keep banking online. I did, and it went to my desktop. When I tried to open it, it disappeared. I can't find it anywhere.
Then the computer started doing something and was real loud. I tried to run some anti spyware and could not even open it. I followed the thread here for removing malware, downloaded the appropriate software, and I can't open it either.
I'm afraid if I go online with the bank or to pay a credit card, my info might be compromised.
What can I do?

 

Hi shearsclan,
Welcome to Major Geeks!

Please work through the READ & RUN ME FIRST and attach the requested logs with your next post. The set of logs which are produced correct some problems but also give us the chance to see what's going on in your computer that might be related to malware. If you have any questions just ask.

abri