Problems with clexpect.com pop-up windows in particular occur with Google Chrome browser. Their only goal is to convince you to download and install some suspicious extension into the browser. However, we strongly advise that you do not agree with such proposals, otherwise the system may become damaged and your browser will be essentially messed up. Use this tutorial that will help you to locate the adware causing clexpect.com pop-ups and to remove them all effectively from your computer.