Once in your registry your knackered hence the word virus, for starters it will probably change your user rights meaning you can not touch it (even in safe mode),I am afraid the best option available is buying yourself a decent memory stick salvaging what you can off the infected drive and doing a reformat, it might also be key logging, I hope your bank details are not installed on your computer, internet banking etc.
If I were you go down to Aria buy yourself Kaspersky for about £5.00 a complete security suite for 12 months, I think it is one of the best available, it also has a facility for quick scanning any email attachments sent to you or downloads you make, prevention is much better than cure which is usually expensive.
Don’t take a chance with substandard security. Kaspersky is all eyes on your computer; it has saved my skin so many times, unbelievable the amount of devious bstards who give you a nice present with your movie or song download.
