Pesky Netsky tops virus warnings
Current top of the threats is Netsky.D, the fourth version of an e-mail worm that scours networks seeking new addresses to send itself to.
Users will know if their PC has caught the virus because infected machines will beep at certain times on 2 March.
Many of the viruses on the list of top threats are variants of others that appeared only in the last few weeks.
The original Netsky virus appeared on 16 February but since then has spawned seven variants.
The most successful of these offspring is Netsky.D that was first seen on 1 March but has spread so fast that many anti-virus companies are already issuing warnings about it.
Netsky.D can infect machines running Windows 95, 98, 2000, ME and XP.
Like many other recent Windows viruses Netsky.D relies on curious users to open the e-mail it travels in and click on the attachment it carries to launch the malicious program.
