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.
Worm.NetSky is a nasty worm that distributes itself through email. Once installed, Worm.NetSky will add itself to the Windows registry, ensuring that it loads each time you boot Windows. Worm.NetSky is capable to email itself as an attachment to any email addresses that it can locate on your machine. Worm.NetSky will also open up a backdoor on your PC allowing remote attackers to import and install additional malware to your system. This worm is highly dangerous and should be removed with no delay.
Technical details (How to remove Worm.NetSky(pop up))