WhenU[quote]This is a Potentially Unwanted Program (PUP) detection. It is not a virus or trojan. PUPs are any piece of software which a reasonably security-or privacy-minded computer user may want to be informed of.[quote] See here
"WhenU is a global desktop advertising network that enables consumers to receive popular software for free by agreeing to see ads instead of paying a fee. It is bundled with various software programs. Some vendors allow you to download their software without the WhenU package (i.e. weatherwatcher) while others do not. Those that include the bundle may lose functionality if it is removed.
SaveNow is a add-on product distributed by Bearshare, DivX player, Imesh, and a few other downloadable programs. It tracks what websites a person visits and then pops up separate browser windows with targeted advertisements and special offers. It continuously is downloading updated information about new offers and collects a variety of information.
For more info on ClockSync and SaveNow see here
For more info on Sidefinder see here
For more info on WeatherCast see here
For more info on WhenU see here
Because of legal issues some anti-malware vendors have stopped detecting WhenU as Adware. You may want to consider uninstalling products such as these and look for better alternatives.