Google Error
  

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.

We apologize for the inconvenience, and hope we'll see you again on Google.
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Got this when clicking on a blogspot link from the google reader gadget.

I see it almost every day. Thanks Gos I can restart my router and everything is ok, because I have dynamic IP :)

Seems like it's not just you who's getting this more frequently:

http://www.zoliblog.com/2007/12/17/google-im-not-feeling-lucky/
http://mashable.com/2007/12/17/google-search-error/

this is covered here by the googleblog

http://googleonlinesecurity.blogspot.com/2007/07/reason-behind-were-sorry-message.html

the discussion is on sphinn too http://sphinn.com/story/19263

Yeah, Google shared information in July already and this was discussed here on forum as well.

I've only experienced it once.