Q Our Windows 7 computer is not functioning properly online. In an e-mail I received, I clicked a button to complete a survey and was taken to an Internet page to fill it out. But when I was done, I couldn't submit the survey.
In addition, when I try to load favorite Web pages, I sometimes get a blank page even though the Web address at the top of the page is correct. And on one occasion I logged into a website but found I wasn't able to do anything there.
Our security software says there are no viruses. What's wrong?
KATHY MACKINNON
KANATA, ONTARIO
A The odd behavior of your PC suggests that it is infected with some malware, which you probably got by clicking on an e-mail link to complete a survey.
The survey was likely bogus, and the Web page you were taken to probably downloaded a virus or something of that ilk. It's possible the malware has made itself invisible to your security software.
The rule for e-mail is this: Never click on e-mail links unless you know and trust the sender. There's no guarantee that the Web page the link takes you to is legitimate, no matter how authentic it may look.