Unlike Windows XP, the common tasks pane is shown at bottom in Windows Vista and Windows 7 explorer and is called "Details Pane".
Sometimes you might find that the Details Pane is no longer shown in Explorer window. I have received many e-mails asking for its solution, so here I'm posting a detailed tutorial with screenshots to re-enable missing Details Pane in Vista and 7 explorer:
Without Details pane the explorer window looks like as following:
Click on "Organize -> Layout -> Details Pane".
It'll re-enable the Details Pane:
Sometimes you might face a strange problem when the option to re-enable "Details Pane" in "Layout" menu will be missing:
Don't worry. It happens when Classic folder option is enabled in "Folder Options". Go to "Organize -> Folder and Search Options" and enable "Show preview and filters" option.
Apply it and it'll re-enable the option to show/hide Details Pane and Preview Pane.
NOTE: If you are wondering why the Details Pane is shown at top instead of bottom in the screenshots, then you can visit following tutorial: