I think its a problem with Google, I am got it before too. But if it's not, maybe you can see the post by Xenos here too: http://www.geekpolice.net/-t13604.htm
This message appears when Google detects automated queries from an IP address, which causes a quick traffic spike on google.com. Google explains some possible ways to fix the issue, remove the IP address ban and restore Google search results as usual.
When a computer in the network runs automated queries, it violates Google Terms of Service. This includes using any software that sends queries to Google to determine how a website or webpage ranks on Google for various queries, ‘Meta-searching’ Google or performing ‘offline’ searches on Google.
Remove Google Search We’re Sorry Errors
Step 1 - Try the first and easiest way of deleting cookies from your browser.
If you use Firefox - Go to Tools > Private Data > Check Cookies > Clear Private Data Now
Step 2 - If that does not fix the issue, then download any popular anti-malware software like MalwareBytes , or Spybot Search and Destroy, MacScan (for Mac), and run a full system scan to find and remove spyware and malware which could be triggering those automated queries to Google.
Step 3 – If you tested and your computer and network are secure, but you continue to get the Google errors, then send feedback to Google and they will investigate your report and fix the issue.
You can also take a look at this Google Help page: http://www.google.com/support/websearch/bin/answer.py?answer=86640
It may be caused by malware
Your computer or network may be sending automated queries (Google Gmail)24th September 2009, 3:35 pm