Security threats to PCs with Microsoft Windows have increased so much that computer users should consider using a Mac, says a leading security firm.
Sophos security said that the 10 most commonly found pieces of malicious software all targeted Windows machines.
In contrast, it said, none of the "malware" were capable of infecting the Mac OS X operating system.
Microsoft has pledged that the latest version of its operating system, known as Vista, will be its most secure yet.
One of the reasons for fewer viruses and worms on Mac systems is that the smaller user base for the computer is less of an attractive target for hackers.
I build my own so that ain't an option ...