Microsoft has announced that it has found more security flaws in several versions of Internet Explorer 5.01, 5.5 and 6.0 software programs.
The Redmond giant said some of the flaws are rated critical and could allow attackers to access and run unauthorised commands on users' computers.
There are also "moderate" flaws in several of Microsoft's business software programs - including Windows XP Professional and Windows NT 4.0 - which could potentially allow attackers to purposely crash a computer system.
The company has issued patches, available on its website, to fix the flaws.
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