In order for us to help you it is necessary that you provide us with a HijackThis log. Please follow the guideline at the link below to start a new topic and post your HijackThis log by pasting it into your post. Do not utilize attachments.
If your system is so badly infected that you cannot produce a HijackThis log, then it is very likely that you will need to reformat. If, as you seem to have indicated, you have previously reformatted but the system has been re-infected as soon as it was connected to the network, then it is most likely that all computers on the network are infected and will need to be reformatted, the operating system installed, and an antivirus installed prior to connecting to the internet to download updates. All Microsoft Updates, including service packs, should be installed prior to using the computer to surf the web or download e-mail, etc. If updates are not immediately installed, your computer will be reinfected.This topic is now closed. Please start a new topic by following the HijackThis Guideline posted here: >Guideline for posting your HijackThis log<