Stopcode CHDRt64isst.sys

[KlausT2]

I have very often Windows start error CHDRt64isst.sys and I am looking for help

[VikramTheGreat]

Hi @KlausT2,

Welcome to the HP Support Community.
 

Thank you for posting your query. I will be glad to help you.

Dealing with a startup or blue screen error tied to CHDRt64isst.sys can be both alarming and frustrating, especially when it signals audio driver corruption or incompatibility. Below is a gentle, step-by-step guide to help you resolve it on your HP machine running Windows 10/11:

1. Identify the Culprit: Conexant Audio Driver

The CHDRt64isst.sys file is associated with the Conexant ISST audio driver, commonly integrated in HP notebooks. Most often, these start-up errors arise from outdated or corrupted audio drivers.

2. Remove and Reinstall the Driver

1. Open Device Manager:
   Press Win + X → Device Manager.
2. Navigate to Sound, video and game controllers.
3. Locate Conexant ISST Audio (or similar), right-click → Uninstall device. 
   • Check "Delete the driver software for this device" if available.
4. Reboot your PC; this ensures the old driver is fully removed.
5. After a restart, Windows may automatically install a generic audio driver.
6. If no sound or there's an error: 
   • Return to Device Manager
   • Right‑click → Update driver → Browse my computer, and point to the latest driver that matches your HP model on the Official HP® Support HP website.

👉 HP drivers are typically found on HP Support → enter your laptop's model (e.g., EliteBook, Pavilion), find "Audio".

3. Prevent Windows from Reinstalling Incompatible Drivers

To avoid Windows automatically overwriting your driver:

1. Open Control Panel → System and Security → System.
2. Click Advanced system settings → Hardware tab.
3. Click Device Installation Settings → select No (your device might not work as expected) → Save changes.

4. Disable Audio Enhancements

Sometimes, enhancement features trigger driver instability:

1. Press Win + I → System → Sound.
2. Under All sound devices, select your audio output, then Audio enhancements.
3. Disable all enhancements, apply settings, then restart.

I hope this helps.

Take care and have an amazing day!
 

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Regards,

VikramTheGreat