Microsoft Excel - delay in directories opening

It is because Yyuor ssytem is very Slow: Do the following to Increase the Performance of the PC

Use Disk Cleanup to:

1)Remove temporary Internet files.
2)Remove downloaded program files (such as Microsoft ActiveX controls and Java applets).
3)Empty the Recycle Bin.
4)Remove Windows temporary files.
5)Remove optional Windows components that you don't use.
6)Remove installed programs that you no longer use.

Speed up access to data

Disk fragmentation slows the overall performance of your system. When files are fragmented, the computer must search the hard disk when the file is opened to piece it back together. The response time can be significantly longer.

Disk Defragmenter is a Windows utility that consolidates fragmented files and folders on your computer's hard disk so that each occupies a single space on the disk. With your files stored neatly end-to-end, without fragmentation, reading and writing to the disk speeds up.

When to run Disk Defragmenter
In addition to running Disk Defragmenter at regular intervals—monthly is optimal—there are other times you should run it too, such as when:
1)You add a large number of files.
2)Your free disk space totals 15 percent or less.
3)You install new programs or a new version of Windows.

To use Disk Defragmenter:

1.Click Start, point to All Programs, point to Accessories, point to System Tools, and then click Disk Defragmenter.
2.In the Disk Defragmenter dialog box, click the drives that you want to defragment, and then click the Analyze button. After the disk is analyzed, a dialog box appears, letting you know whether you should defragment the analyzed drives.

Tip: You should analyze a volume before defragmenting it to get an estimate of how long the defragmentation process will take.

3.To defragment the selected drive or drives, click the Defragment button. Note: In Windows Vista, there is no graphical user interface to demonstrate the progress—but your hard drive is still being defragmented.

After the defragmentation is complete, Disk Defragmenter displays the results.

4.To display detailed information about the defragmented disk or partition, click View Report.

5.To close the View Report dialog box, click Close.

6.To close the Disk Defragmenter utility, click the Close button on the title bar of the window.

Everyone knows that Windows computers can sometimes slow down over time. While not an exhaustive list of solutions to problems, this collection presents seven ways to speed up a computer.

Complete with step-by-step instructions and numerous screen shots, even novice computer users can follow these steps. The steps and screen shots are intended for Windows XP users, but users of other Windows versions can follow a similar process.

7. Stop Programs from starting on Windows boot