# NVENC in Windows service / Session 0 Isolation

**URL:** <https://community.wowza.com/t/nvenc-in-windows-service-session-0-isolation/33610>\
**Category:** Wowza Streaming Engine\
**Created:** [November 5, 2014, 2:50pm UTC](https://community.wowza.com/t/nvenc-in-windows-service-session-0-isolation/33610 "2014-11-05T14:50:33Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![Karel\_Boek](https://sea2.discourse-cdn.com/flex002/user_avatar/community.wowza.com/karel_boek/32/454_2.png) [@Karel\_Boek](https://community.wowza.com/u/Karel_Boek)\
**Post date:** [November 5, 2014, 2:50pm UTC](https://community.wowza.com/t/nvenc-in-windows-service-session-0-isolation/33610/1 "2014-11-05T14:50:33Z")

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> Drivers for NVIDIA NVENC and NVIDIA Tesla GPU hardware are structured in a way such that the hardware acceleration capabilities are available to applications running in Session 0 Isolation.

According to the documentation; NVENC should be available when running Wowza as a Windows service. (ref: [How to enable hardware-accelerated transcoding when running as a Windows service](https://www.wowza.com/docs/how-to-enable-hardware-accelerated-transcoding-when-running-as-a-windows-service))

But when I start the Windows service, start a stream that has the Transcoder Add On enabled, the log tells me “NVidia hardware acceleration is NOT available”. And when I start Wowza from the desktop, it works (“NVidia NVENC hardware acceleration is available; GPU[0]: name:“Quadro K4200” version:3.0 driver:6050 … etc”)

How can I make NVENC available even when Wowza is running as a Windows service?

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**Author:** ![sal\_jefferson](https://avatars.discourse-cdn.com/v4/letter/s/6de8d8/32.png) [@sal\_jefferson](https://community.wowza.com/u/sal_jefferson)\
**Post date:** [November 6, 2014, 8:22am UTC](https://community.wowza.com/t/nvenc-in-windows-service-session-0-isolation/33610/2 "2014-11-06T08:22:18Z")

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Hello,

Have you made sure you meet these requirements:

[Hardware and driver requirements](https://www.wowza.com/docs/how-to-set-up-and-run-wowza-transcoder-for-live-streaming#hwDriverReq)

Sorry I do not have much to add as far as help. It may be best for you to open a support ticket and work with the support team on this as there are plenty of variables to account for. You can open a ticket by emailing support@wowza.com

Kind regards,

Salvadore