Proxy Settings
Malware and Trojan Application can change your browser proxy settings. Microsoft has provided a tool to change the affected registry keys. You can use the Fix It tool by accessing the link bellow:
https://support.microsoft.com/en-us/kb/2289942
The following changes are made to the registry:
reg add “HKCU\Software\Microsoft\Windows\CurrentVersion\Internet Settings” /v ProxyEnable /t REG_DWORD /d 0 /f
reg delete “HKCU\Software\Microsoft\Windows\CurrentVersion\Internet Settings” /v ProxyServer /f