News.com reports that Microsoft will not fix a critical flaw in the Windows 98 and Windows ME operating systems because to do so could break other applications. Microsoft said that making a patch available was “not feasible,” and that it would “require re-engineering a significant amount of a critical core component of the operating system.” The company said that they would not be able to guarantee that other programs on the platform would be in operational condition after a fix. Instead, Microsoft instructs users to protect their PCs by using a network firewall, which will prevent hackers from exploiting the flaw…