I have Dell computer at home which I gather has a virus. When I turn it on I have to choose a mode 1-4 (yes I have tried all modes) I get a message that states ( in dos) that i am missing a windows\system\vmm32. file. Then it says I need to SCANREG. It won't take any cd I have or let me do anything. Any ideas out there other than a sledge hammer? TIA.