It sounds like something might still be buried on your system.
1. Download the following programs:
2. Reboot into safe mode.
Here's a link that shows you how to get into safemode:http://us.blizzard.com/support/article/21148
3. Run Rkill, then run FixTDSS.
If FixTDSS finds a rootkit, it'll need to restart to remove it. You can let it restart normally.
4. Download & install malwarebytes.
Here's a link where you can download Malwarebytes: http://www.malwarebytes.org
*Be sure to completely update it before running any scans.*
Do a full scan - it'll take over an hour, but its required to remove any keylogger bits.
Once all that is finished.....
Please run this online scan. Make sure you accomplish the recommended fixes the scan may find.
Want to speak with someone directly? http://us.blizzard.com/en-us/company/about/contact.htmlCheck your G-diffuser system!