Open the Control Panel, select Add/Remove Programs and select the Windows Setup tab. Windows 98 will search your system for installed components. If an item under Components has a white, checked box next to it, all items within that component have been installed. Ignore them. If the checked box is gray, however, there are items inside that component that were not installed. To see what they are, select that component, click Details, and look for the unchecked boxes. Click OK to get back to the main list of components.

Repeat these steps for all partially installed components to see what you may (or may not) be missing out on. You can select additional components to install at any time during this exploration. Windows will keep track of what additional space is required and display it in red. When you're finished making your selections, click OK to go back at the main list of components. Insert the Windows 98 installation disk if and when it asks you to, then follow the directions to complete the installation.