"We're sorry... ... but your query looks similar to automated requests from a computer virus or spyware application. To protect our users, we can't process your request right now.
We'll restore your access as quickly as possible, so try again soon. In the meantime, if you suspect that your computer or network has been infected, you might want to run a virus checker or spyware remover to make sure that your systems are free of viruses and other spurious software."
This may not be because of you directly. There's a good chance it's your ISP that's blocked, not you. This has happened several times to the corporate environment where I work. It's not an Adsense thing, it's a Google-wide thing.
You shouldn't be totally locked out, there should be a captcha you can enter to get through manually, isn't there?