Do i have a trojan

When i turn on my laptop all the thinks appears OK, howerver without any explanation y get a dialog box asking me my user name and passw to conecct the computer to internet. Question: Who is doing that call to thata dialog box. Al the software upgrades a have them manually. How cai i detect what kind of software is doing the call.
Please urgent....
warm regards

 

Welcome Hernan,

Please download Startuplist and run the program. It creates a txt file that displays every possible startuplocation for Windows.

If you have problems analyzing it, copy and paste it´s content into your reply, so we can have a look and try to find the culprit.

Regards,

Pieter

 

try looking at TOOLS, INTERNET OPTIONS, CONNECTIONS
and check to see ifv you have always dial my default connection ticked.
That is if you are using Internet Explorer for your browser.

 

Hernan, are you using a firewall and if so, which one?