Help From Microsoft
Microsoft offers several forms of technical support: standard telephone support, priority (fee-based) telephone support, and a searchable knowledge base. To find out more, select Help - About Microsoft Excel, then click the Tech Support button.
If you use Excel 2007, click the round "office" button, and then click Excel Options. In the Excel Options dialog box, click Resources.
Microsoft's tech support is confusing, and continually changing. Here's a link to get you started:
After that, you're on your own.
Excel Resources
This section contains a variety of information about Excel, sources for help and selected Excel-related links.