Adware:Adware (or spyware) is a small program that is designed to show advertisements (in various form and degrees of intrusiveness) on your computer. It often reports personal information back to its owners. As a result your sense of privacy can be violated.
It is an adware spyware designed to show annoying advertisements in web browser windows, pop-ups or undesirable toolbars. It can be distributed with ad-supported software, some malicious sites may install to the computer without user permission. LinkGrabber 99 receives commercial data and updates from its home servers. On occasion it can perform additional malicious actions, such as browser hijacking or tracking user activity in the Internet. The threat is able to start automatically on every Windows startup and remain hidden in background. Its activity violates user privacy and affects computer performance.
Technical details (How to remove LinkGrabber 99(pop up))