tezrh

Hi, I just tried to get into the control panel again--in both safe and normal modes, and was unsuccessful. in safe mode the icons come up for about 2 seconds and then disappear. In normal mode i can hit the control panel tab, but the desktop freezes, then the control panel box comes up for a split second before the whole desktop seems to reload, killing it. I then tried downloading the SDfix onto an external hard drive and loading it onto the desktop, but my computer will not even recognize the hard drive. Is there anything I can do?