not good ......
http://www.paretologic.com/resources/definitio ns.aspx?remove=adviva%20cookie
Description
Adviva cookies store information about a PC user�s interaction with a specific website. Standard Cookies are not inherently dangerous, but they can be misused and exploited and may allow a distinct and apparently unrelated website to access the same information. If more than one website can access a cookie that has been placed on the user�s PC, that cookie poses a security and privacy risk. Tracking cookies can allow vendors to analyze browsing behaviour for marketing purposes.
is your anti-virus up-to-date etc
initiate a full-system scan
see if others can help you on Technology topic?