google captcha problem

[viany]

in our office when we are browsing internet we are getting a error message as "Our systems have detected unusual traffic from your computer network"... and it is repeating very badly .... so can anyone tell to how to overcome the error ..

 

[pyro226]

http://support.google.com/websearch/answer/86640

Most likely, there malware somewhere on the network causing it.

 

[viany]

thanks pyro226 ...except hijackthis ... is there any other method to solve this issue...

 

[pyro226]

thanks pyro226 ...except hijackthis ... is there any other method to solve this issue...

It could be any computer connected to the internet at your workplace (including cell phones, but that seems less likely). Depending on the size of your workplace, you can ask around to see if anyone is having problems with an extremely slow computer or unexpected computer problems. If your company has network monitoring tools, look for any large amounts internet activity when no one else is in the office or unsusual traffic.

Normally a good anti-virus will detect problems if a computer has malware. You can first check with whatever your company anti-virus is. It's difficult to recommend any specific software because most have licensing fees to businesses. If it were a personal computer, I would use Malware Bytes Anti-Malware to fix most of the issues (it detects a lot of what many antiviruses will miss).

Free options are:
-Malicious Software Removal tool - It's an added coomponent of windows that will detect major infections. Most windows computers will have it.
-Microsoft Security Essentials - Microsoft's own free anti-virus. It's pretty good at detecting problems, but you shouldn't run / install more than 1 anti-virus on a PC at a time or it will cause conflicts and the computer down.

These two options would allow you to at least figure out which computer has the malware. From there, you can proceed to fix it via Safebooting, Malicious Software Removal tool (run this first), and company Anti-Virus. From there, you'll have to double check settings that malware normally changes (browser settings and proxy settings). The other option is to backup whatever files you need (being careful not to spread malware via the backup) and formatting the afflicted computer.