Malware Recovery - Be sure to change your passwords
Many current malware attacks are sophisticated and can greatly compromise security on your PC. When repairing a compromised system, it's always a best practice to change your Windows and Internet passwords.
One reason is that sometimes backdoors or keyloggers may have disclosed passwords and phoned them home to the bad guys. Secondly, most folks don't change their passwords often enough and what better time to do so.
Always use COMPLEX passwords with upper/lower case along with letters/numbers. Examples: Red01Sox ChocBar99, Mt11Dew22, etc. You can also use special characters (although that can add difficulty in remembering them. If you have to write down or store passwords, always keep it both secure and up-to-date.