03. Access Denied Error when try to add new printer driver, like EPSON LQ850

Windows 7:

1. Go to Control Panel | User Accounts and Family Safety.

2. Click on User Accounts.

3. Click on "Change User Account Control settings".

4. Set to "Never notify" (lowest level). Press OK.

5. Do you want to allow the following program to make changes to this computer? Press YES to proceed.

5. Restart the computer.

6. You may add new printer driver EPSON LQ850 into Windows 7.

Windows 8:

01. Follow Windows 7 Steps from 1 to 5.

02. Go to Control Panel | Devices and Printer.

03. Click on any Printer.

04. Click on Printer server properties.

05. Click Driver Tab

06. Click Change Driver Settings.

07. Add Button.

08. Click Next 2 times.

09. Click Have Disk

10. Browse to find the ntprint.inf (EPSON LQ850 driver)

11. Install as normal till Finish button.

12. System will prompt "Unsigned driver warning" just click Yes.

13. Click Close after Done.

14. Right Click the Printer (i.e. Panasonic KXP-1121) | Printer Properties

15. Click Advance Tab

16. Select Epson LQ-850 at the Driver List.

17. Click Apply.