Microsoft seems to have survived the worst the MyDoom could throw at it - but experts are warning the web virus is still spreading quickly.
Experts say the virus, the most widespread ever, was programmed to fire continuous volleys of debilitating data at the software behmoth's website on Tuesday.
But the virus had no visible impact on the site which barely flickered as the trigger time of 1309 GMT passed.
Microsoft said it had taken a series of technical precautions to ward off any attack, but declined to give details of how it weathered the bombardment.
Despite the apparent failure of the attack and many users protecting their PCs, experts warn that the virus is continuing to spread.
MyDoom has infected hundreds of thousands and possibly over one million PCs, generating a torrent of spam e-mails, crippling corporate e-mail servers and slowing traffic for some Internet service providers.
The biggest victim of the initial strain of the MyDoom virus - MyDoom.A - was Utah-based computer software firm SCO Group.
The week-old worm, also dubbed Novarg or Shimgapi, knocked the SCO site offline on Sunday with a barrage of data known as a denial of service attack.
However, the strain designed to attack Microsoft on Tuesday - MyDoom.B - was always thought to be less potent than its predecessor and has spread much more slowly.
Experts say the virus, the most widespread ever, was programmed to fire continuous volleys of debilitating data at the software behmoth's website on Tuesday.
But the virus had no visible impact on the site which barely flickered as the trigger time of 1309 GMT passed.
Microsoft said it had taken a series of technical precautions to ward off any attack, but declined to give details of how it weathered the bombardment.
Despite the apparent failure of the attack and many users protecting their PCs, experts warn that the virus is continuing to spread.
MyDoom has infected hundreds of thousands and possibly over one million PCs, generating a torrent of spam e-mails, crippling corporate e-mail servers and slowing traffic for some Internet service providers.
The biggest victim of the initial strain of the MyDoom virus - MyDoom.A - was Utah-based computer software firm SCO Group.
The week-old worm, also dubbed Novarg or Shimgapi, knocked the SCO site offline on Sunday with a barrage of data known as a denial of service attack.
However, the strain designed to attack Microsoft on Tuesday - MyDoom.B - was always thought to be less potent than its predecessor and has spread much more slowly.
