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Microsoft Excel 97 XLM Macro Security Update brings an innovative, versatile spreadsheet program. When an XLM macro sheet is saved as a text file and the text file is then opened into Excel, users may not receive the usual macro warning dialog box. This vulnerability could allow malicious code stored within the XLM macro sheet to perform harmful acts, including deleting files. This update corrects the XLM macro security vulnerability by always displaying the macro warning dialog box when you open an XLM macro sheet, even if the XLM was saved as a text file.

A vulnerability has recently been discovered in Microsoft Excel 97 and Excel 2000. If an Excel worksheet containing the REGISTER.ID function references a malicious DLL (Dynamic Link Library) it can potentially cause code to run on a user?s computer without their knowledge. The code executed on the affected users computer can perform any action that the user could perform on the machine. he Microsoft Excel REGISTER.ID Security Update eliminates the vulnerability that could be exploited using the worksheet tools of Excel 2000 to do malicious acts, such as deleting and overwriting files without the users input or verification. This update protects against harmful code that could be executed from a worksheet by disabling the REGISTER.ID function. Note: To use the Excel 2000 REGISTER.ID Security Update, you must have installed Office 2000 SR-1 or Office 2000 Service Release 1a (SR-1a).