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.XLSX Files

The .XLSX file extension is a new file type format used by the Microsoft Corporation in the 2007 edition of the Microsoft Office Suite. It has replaced the previous .XLS file extension. This new file format is an efficient, compressed and secured XML file.

Microsoft Office Excel is one of the most popular and widely used software applications in home and business enterprise microcomputer environments. It has become an industry standard because of its functionality and flexibility to be used either as a stand-alone application or incorporated into other software applications (for example inserted as a chart within an MS Word document or a MS PowerPoint slide show.

The .XLSS file extension describes each Excel file that contain a series of individual "spreadsheets" that collectively make up an Excel workbook. The Excel spreadsheet is designed to enable you to present a wide range options for the presentation tracking and calculations of figures - Excel has incredibly wide practical uses such as tracking financial information over time, calculating, summarizing, analyzing and manipulating any type of numerical data.

Common Problems With .XLSX Files

Despite their ability to implement Open XML and ZIP technologies that create smaller files, the newest generation of Microsoft Word spreadsheet files seem to still be prone to some common problems. These problems include:

  • being vulnerable to file corruption;

  • becoming "lost" by the Windows Registry;

  • susceptible to spyware or viruses; and,

  • compatibility with previous versions of MS Word.

The .XLSX file extension is also know to have problems associated with invalid instructions called within the Windows System Registry - in this case it is hard to determine if it is a specific problem with the.XLSX file type or the Windows Registry itself.

There have also been some instances where the .XLSX files used by Microsoft Word are not recognized when running as a domain user on Microsoft Windows XP or Microsoft Office 2007 Enterprise. This is unlike using a domain administrator account on MS Windows XP or Microsoft Office 2007 Enterprise. The issues seems to arise when you try to set file associations to the .XLSX extension and it is not reflected in the Windows registry. The result is that the operating system does not know which application to launch when opening these files.

Opening .XLSX Files

The .XLSX file extension can be opened by "double-clicking" on the file itself in the Explorer view - or through the "File-Open" command within Excel. Given the different legacy versions of Excel (Excel 97, Excel 4.0, Excel 2003) that exist, you may experience some challenges in opening a .XLSX file saved from Excel 2007 if you are running one of the older versions of Excel. If you are using the Office 2007 version of Excel you will have no problem opening .XLSX files or any .XLS files created by older versions of Excel.

If you have the correct version of Excel properly installed and are still unable to open .XLSX files then you are likely facing a different set of problems. Most likely you do not have the correct software application (or version) installed to open the file, or there is an incorrect file association within the Windows Registry. Most file extension errors due to wrong association or a possible problem with the Windows Registry, can be easily resolved by installing the appropriate application for the file type or correcting Windows Registry errors with a good registry cleaner.

Security Threats With Excel Files

.XLSX marcos - which are in essence self-executing files within Excel - have been known to be vulnerable targets of malicious attacks from spyware, malware and trojans. Anti-virus protection is not enough; you would need an application that specifically addresses threats from these malicious codes.

It is a generally accepted fact that the majority of infections come from files downloaded or shared via the Internet - this certainly applies to .XLSX files. Therefore, every precaution must be taken before opening this file type even if it was delivered or e-mailed by a trusted source. Opening .XLSX files always presents the danger of malware or virus infection. Before opening one of these file extensions ensure it comes from a source you trust, you have good anti-virus, anti-spyware, spam controls, privacy software, a registry cleaner and trusted data recovery tools activated and protecting your system.

If you are having problems opening a. XLSX file the most basic way to check to see if it is the file or a potential problem with your PC or laptop is to try and open the file on another computer - if it does not open, then there is likely something wrong with the file.

Programming with Excel

One of the most useful and advanced features of the Microsoft Office Excel application is the functionality that allows the user to incorporate Visual Basic for Applications (VBA) commands into the worksheet. These VBA commands are referred to as macros.

The macro feature, which has been available since 1993, allows the automation of Excel tasks and the supply of UDF (User Defined Functions) utilized within the .XLSX file that includes a full featured IDE (Integrated Development Environment). The application feature of macro recording allows the replication of user actions that translate to the simplification and automation of otherwise redundant tasks.

Manipulating the entries within the spreadsheet is done with the use of objects that respond to corresponding codes or subroutines that can depend on user input and are instantaneously reflected on the spreadsheet or associated charts.

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