fixthereg.com - what to do after the "read and run me first" ?

Hi Guys,

I was getting a pop up telling me that my registry is corrupted and to go immediately to fixthereg.com for a scan.

Sistema mensageiro
STOP! WINDOWS REQUIRES IMMEDIATE ATTENTION
Windows has found CRITICAL SYSTEM ERRORS
To fix the errors please do the following
1. Download Registry Repair from: http://www.pcregistryhelp.com
2. Install Registry Repair
3. Run Registry Repair
4. Reboot your computer
FAILURE TO ACT NOW MAY LEAD TO DATA LOSS AND CORRUPTION"""

there were various other messages that came up, each with a different website such as FixRegNow.com and FixTheReg.com.

I did all the steps in the READ AND RUN ME FIRST, in normal mode and safe mode; some of the programs found and deletd some files (alexa, kazza related, etc); The bit defender found several suspected files and deleted them, but found one virus which it was not able to delete ( I have the report but didn't know if you need me to send it). This virus was later identified when I ran the Panda active scan as:

Virus:W32/Godog Renamed C:\CONGWIN\CongZip.exe I don't know if I'm supposed to run hijackthis next; I believe now I must concentrate on removing this virus (I don't know how to do it, I found several webpages related to it but decided to wait for your opinion...).

Thank you very much for your help,

Isabela