Sharp PN-E421 User Manual page 11

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How to Recover to Factory Installed Condition
1. Before beginning
Make sure that all the data including contents and programs you installed
are backed up.
If you are trying to recover from a bad HDD, please have a qualified
technician runs diagnostics and replaces defective components.
If the unit is in warranty, please contact Sharp Customer Service.
2. Items needed
Recovery DVD (comes with the unit)
USB DVD Drive
3. Windows OS installation from Recovery DVD
Attach USB DVD Drive to one of the 6 available USB ports on the back of
the unit.
Insert the recovery DVD and reboot the PC.
Follow instructions and install Windows OS.
Remove the recovery DVD and reboot.
4. Install System Drivers from Recovery DVD
Insert the recovery DVD.
Install Chipset, HD audio, HDMI audio, and WiFi drivers.
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5. Install 3 Party Software from Recovery DVD
Microsoft Internet Explorer 8
Windows Media Player 11
Microsoft Powerpoint Viewer 2007
Adobe Flash Player 10
Apple Quicktime 7
Media Player Codec Pack v.3.9.5
6. Install SDSS & Optimize Windows
Follow instructions from the included SDSS operating manual.