My computer is suffering from viruses that are preventing any attempt I have made to fix it & try to boot into the operating system. The infestation has propagated to other external devices; some of the keys on my keyboard no longer work I suspect the virus has disabled them. Also, I have received messages on my monitor to confirm that boot ini & Ntoskernal files are either corrupted or missing. Could you please quote to replace essential boot files and to remove all traces of the virus, confirming 100% that they have been cleared and that the system is clean to allow it to boot. I can then format the hard drives myself and reinstall a clean copy of the windows operating system.