You have a rootkit, you will need to clean your PC. Here are the steps.
1. This will fix your firewall issue....follow the instructions on this site and run the combofix programs. http://www.bleepingcomputer.com/combofix/how-to-use-combofix
2. Continue to clean your PC/ check the options to scan all files and remove threats, its been a while since I ran this so the options may be different.
http://www.eset.com/us/online-scanner/
3. Continue to clean your PC/ check the option to Scan all Users and then click QUICK SCAN
http://oldtimer.geekstogo.com/OTL.exe
Run this program again and in the custom fix location copy and past this then click RUN FIX
:files
ipconfig /flushdns /c
:Commands
[emptytemp]
[clearallrestorepoints]
Allow this to run uninterrupted and then reboot.
Run this program again on reboot and click CLEAN UP, you may need to visit the link every time to run it.