Unable to download spyware removal tools

Hello,
I have exactly the same issues than the persons above. The suggestions did not work. Everything comes up with an error message as soon as any of the spy ware removers have to go to their websites for download. I have tried it on various websites and various browsers. I can't even get Internet explorer to work anymore. The only one that seems to work almost normal is safari. My virus scanner does not find any infection. I am unable to run any virus or spyware in safe mode.
Any other ideas anyone?
Thanks