Apple System 7.1 - Manual (Page 5)

The QuickTime extension is included with System 7.1, but QuickTime is not automatically
installed with the system software.
If you install QuickTime, 4 MB or more of RAM are recommended.
To install QuickTime:
1. Complete the System 7.1 installation.
2. Drag the QuickTime and Scrapbook icons from the QuickTime disk to your System Folder
icon (not into the open folder).
3. Click OK in the dialog box that appears.
4. Restart your Macintosh.
Using the QuickTime Extension
You do not interact directly with the QuickTime extension. It works behind the scenes as
part of your system software, providing new features to the application programs you work
with. The specific features of QuickTime that you use and how they are presented depend
on the programs you use.
TROUBLESHOOTING
This section helps you solve problems you may encounter when upgrading to System 7.1.
Not Enough Disk Space
Problem: When you try to use the Installer, you see a message that there is not enough
disk space available.
Cause: Your computer's hard disk has less than 4 megabytes of space available, the
minimum required to use the Installer.
Solution: Make more space available on your hard disk by removing some files from the
disk. Make backup copies of the files, if necessary, then drag them to the Trash and
choose Empty Trash from the Special menu.
You can also try starting up your Macintosh using the Install disk. Using the Installer
this way requires less disk space.
Messages Interrupt the Installation
Problem: When you try to use the Installer, you see a message that the System file cannot
be modified (or repeated messages asking if it's okay to modify the System file).
Cause: You have installed virus protection software that guards against modification of
the System file.
Solution: Turn off your virus protection software by dragging it out of the System Folder
and restarting your computer. You can turn the virus protection software back on after
installing System 7.1.
You Can't Start up the Computer
Problem: When you turn on your computer, you see a "bomb" message.