I'm sorry but it's hard to tell what went wrong here. To avoid future infection please read these recommendations:
A common attack method for hacking attempts and malware installs is to exploit known vulnerabilities in programs that are commonly installed on a person's computer. These vulnerabilities could allow a remote user or malware developer to install malware, keyloggers, and backdoors on to your computer without your knowledge or permission.
Some of the programs that are commonly exploited include Adobe Shockwave, Adobe Reader, Sun Java, Adobe Flash, and even Windows itself. Therefore it is crucial that everyone remain vigilant as to when a security vulnerability is found in our installed programs and to update it when a security update is released. Unfortunately, no one has the time to stay on top of these updates, which can happen frequently.
I highly recommend you to install Secunia Personal Software Inspector (PSI) that can be used to scan your computer for known vulnerable programs, provide information on the vulnerability, and provide a location to an update for the vulnerable program. A tutorial on how to use Secunia Personal Software Inspector (PSI) can be found here: Keep Software Updated with Secunia PSI.
Web Browsers - Picking the right internet browser is very important. You need to find one that suits your needs but that is also safe. All browsers listed below are far more secure than Internet Explorer, immune to almost all known browser hijackers, and also have the best built-in pop up blockers.
Although, if you prefer staying with Internet Explorer I highly recommend you do this :
Make Internet Explorer more secure:
- Click Start > Run
- Type Inetcpl.cpl & click OK
- Click on the Security tab
- Click Reset all zones to default level
- Make sure the Internet Zone is selected & Click Custom level
- In the ActiveX section, set the options Download signed and unsigned ActiveX controls to Prompt, and Initialize and Script ActiveX controls not marked as safe to Disable.
- Next click OK, then Apply button and then OK to exit the Internet Properties page.
Tips to protect yourself against malware and reduce the potential for re-infection:
- Simple and easy ways to keep your computer safe.
- Hardening Windows Security - Part 1 & Part 2.
- Your Guide To Staying Safe Online.
- Use Task Manager to close pop-up messages to safely exit malware attacks.
- How to Secure Your Web Browser.