Today when I went to use my computer, after turning it on in less than 15 seconds I would see the Command Prompt flash open for a very short time then all icons and the start menu would disappear. Ctrl+Alt+Delete did nothing. I pulled out the battery and unplugged it then tried turning it on and the same thing happened. I then started it in safe mode, and it was working as much as a computer in safe mode should. I ran Microsoft Security Essentials and it found 4 virus' that it deemed to be worms. It "quarantined" then removed the 4. I then restart it and it will not boot..in safe mode or normal. I also tried booting it from the last known good boot settings or whatever that was (did not work). When trying to boot it now pops up asking if I want to boot normally or Launch Startup Repair (recommended). If I boot normally it goes to the screen with the Microsoft Windows flag, and below it, it says, "Starting Windows," and, "©Microsoft Corporation," as it should, however it does not pass this point. If I go to Startup Repair, it says, "Windows Boot Manager," at the top, then a short explanation telling me to insert my Windows installation disc. In the bottom half of this screen it says, "Status: 0xc000000e," and, "Info: The boot selection failed because a required device is inaccessible." This is a Toshiba Portégé M400 running windows 7. I do not have any other internet connected computers (this is actually my phone I'm typing from),.