It looks like the “dell4yuoxuzal” error you’re seeing is actually related to a buggy BIOS update, not that mysterious software. Visit Dell’s support site, enter your Service Tag, and locate an earlier BIOS version.
Multiple Dell users report:
Their laptops (e.g., Inspiron 5405, G5, XPS models) start crashing with system errors (Blue Screens, BSOD) after installing the latest BIOS/firmware from Dell.
Reverting to a previous BIOS version (e.g., from 1.17.0 down to 1.16.0) consistently fixes the crashes.
🛠️ What You Can Do Now
1. Roll Back Your BIOS
Visit Dell’s support site, enter your Service Tag, and locate an earlier BIOS version (one below the problematic release).
Download and run the installer to downgrade your BIOS.
Several users report this instantly fixed the random crashes.
2. Disable Automatic BIOS Updates
After downgrading, take these steps to prevent Windows Update or SupportAssist from reapplying the faulty BIOS:
In BIOS Setup: Look for options like “UEFI capsule firmware updates” under Security. Set it to Disabled .
In Windows, disable Dell SupportAssist’s firmware update tasks/services or uninstall it entirely. This can be done via Services → disable “Dell Data Vault Collector,” and delete its Scheduled Task.
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3. Remove or Disable Dell SupportAssist Tools
The DellInstrumentation.sys and SupportAssist often clash with BIOS or firmware updates, causing crashes:
Uninstall Dell SupportAssist from the Control Panel or Settings.
In Services (services.msc), disable Dell Data Vault Collector.
In Task Scheduler, turn off any tasks related to Dell SupportAssist.
4. Pause Windows Updates Temporarily
This will help until Dell issues a fixed BIOS:
Go to Settings → Update & Security → Windows Update, and choose to Pause updates for several weeks.
🔁 Quick Fix Summary
| Step | Action |
|---|---|
| 1 | Downgrade BIOS to the last stable version (e.g., 1.16.0) |
| 2 | Disable BIOS auto-updates in UEFI/BIOS settings |
| 3 | Uninstall SupportAssist and disable its related services/tasks |
| 4 | Pause Windows Update until Dell releases a fix |
⏳ What Happens Next?
Once Dell confirms and re-releases a clean BIOS update, you can reverse these steps. Keep an eye on Dell’s driver site and announcements. For now, staying on the older BIOS is your safest bet.
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