Moved to Networking forum. Only certain members can reply within the Malware Removal forum so you won't find much help there, plus that forum is for threads including the logs from the removal instructions.
Have a look through
this article for the slowness of the computer problem.
You could try reinstalling the drivers for the wireless device on the computer for the connection problem, I will tell you how you can do this once you download the latest drivers from the manufacturer's website.