Hi there, my laptop had been infected with hldrrr.exe. It uses up all my cpu, and my antivirus and firewall get shut down. I can get rid of it. I followed advices from various forums and downloaded icesword,hijackthis, combofix, i tried to rename the file as advised but when i try to run the program, a pop up tells me that this .exe is not a valid win32 application.

I don't know what to do ?
Thank you in advance for your assistance !