So. When you turn the laptop on, it does the following?
1.) Fans, lights come on, hard drive spins up (listen for the spin up noise)
2.) DELL logo shows on the screen, allowing you to go to setup menu
3.) PC tries to boot an OS, but it gets yellow, blue, and red lines.
OR does it do the following?
1.) Press button. Screen comes up with yellow, blue, and red lines and nothing else happens?
If the second is true, then the virus may have eaten your BIOS. If they infect that, your PC is pretty much toast. If it didn't damage your BIOS, then you should be able to use Boot and Nuke or another program. Does your laptop have a floppy disk drive? Does it have a CD/DVD-ROM drive? If yes, download a copy of Boot and Nuke just to see if it boots up. Before wiping the drive, you can try to salvage important data using a Linux CD such as DSL (DSL information
) and use it's file manager to copy to a USB drive or to a network. When done, you can format the hard drive and restart.