Solve the Can't find VPPP adapter Error of Smart VPN Client

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DrayTek Smart VPN Client software for windows requires DrayTek Virtual PPP adapter to provide the SSL VPN service. The driver should be installed during Smart VPN Client software installation; however, if you see such error while establishing the SSL VPN connection, please follow the steps to resolve it.

a screenshot of error message of Smart VPN Client

Part 1. Disable AV-software

Please disable AV-software, then reboot PC to see if VPPP driver was detected as malware.

Part 2. Check the VPPP Adapter on Device Manager

1. Right-click the Start menu, then click Device Manager.

a screenshot of Windows Start menu

2. Expand the Network adapters category, check whether the DrayTek Virtual PPP Adapter is on the list:

a screenshot of Windows Device Manager

Part 3. Install VPPP Adapter Manually

1. Right-click on the icon on the top of the list, then click Add legacy hardware.

a screenshot of Windows Device Manager

2. Click Next on the welcome message page.

a screenshot of Windows Add Hardware Wizard

3. Select Install the hardware that I manually select from a list (Advanced), then click Next.

a screenshot of Windows Add Hardware Wizard

4. Select Network adapters, then click Next

a screenshot of Windows Add Harware Wizard

5. Click Have Disk… to choose the file on the disk.

a screenshot of Windows Add Harware Wizard

6. Go to the location where you install the Smart VPN Client, then go to driver >> X64 folder.
(Default path for 64bit platform: C:\Program Files (x86)\DrayTek\Smart VPN Client\driver\X64\attestation\ ; 32bit platform: C:\Program Files\DrayTek\Smart VPN Client\driver\attestation\ )

a screenshot of Windows Add Harware Wizard

7. Select VPPP.inf, click Open.

a screenshot of Windows Add Harware Wizard

8. Click OK.

a screenshot of Windows Add Harware Wizard

9. Click Next.

a screenshot of Windows Add Harware Wizard

10. Click Next to install.

a screenshot of Windows Add Harware Wizard

11. Click Install on the pop-up window.

a screenshot of Windows Add Harware Wizard

12. Click Finish to end the installing. Then, restart your computer.

a screenshot of Windows Add Harware Wizard

Update VPPP Adapter Manually

1. Right-click the VPPP adapter, then click Update Driver.

a screenshot of Windows Device Manager

2. Click Browse my computer for driver software.

a screenshot of Windows Add Hardware Wizard

3. Select Let me pick from a list of available drivers on my computer.

a screenshot of Windows Add Hardware Wizard

4. Select Draytek Virtual PPP Adapter, then click Have Disk.

a screenshot of Windows Add Harware Wizard

5. Click Browse and Go to the location where you install the Smart VPN Client, then go to driver >> X64 folder.
(Default path for 64bit platform: C:\Program Files (x86)\DrayTek\Smart VPN Client\driver\X64 ; 32bit platform: C:\Program Files\DrayTek\Smart VPN Client\driver\ ), and then select VPPP.inf, click Open and OK.

a screenshot of Windows Add Harware Wizard

a screenshot of Windows Add Harware Wizard

6. Click Next to update.

a screenshot of Windows Add Harware Wizard

7. Click Close to end the installing. Then, restart your computer.

a screenshot of Windows Add Harware Wizard

Part 4. Install the VPPP Adapter by CMD

Please install VPPP driver by CMD run as administrator when you have Android devices connected to the PC before. The drivers could be incompatible.

1. Run CMD as Administrator

a screenshot of Windows CMD

2. Enter command “\Program Files (x86)\DrayTek\Smart VPN Client\driver\installcmd64.exe” draytekvppp

note: path variable by Smart VPN Client path.

a screenshot of Windows CMD command

3. Run Smart VPN Client, and click OK when it pops up message "VPPP driver is necessary for this feature! …"

a screenshot of smart vpn client install VPPP hint

Part 5. Re-install Smart VPN Client

Re-install the latest Smart VPN Client, and reboot PC.

If above doesn't help, please submit a support ticket, and provide Smart VPN Client version and Windows version(winver).

Published On: Nov 28, 2017 

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