How to Fix "Windows Experience Index Could Not Be Computed" Error

Simple Steps to Fix the Problem

1. Run Performance Troubleshooter

Press Win + R, type: msdt.exe -id PerformanceDiagnostic
Click Next and follow the prompts.

Why? Automatically detects and fixes common assessment blockers.

2. Update Graphics Drivers

Right-click Start > Device Manager > Expand Display adapters
Right-click your GPU > Update driver > Search automatically

Why? Outdated drivers prevent proper performance assessment.

3. Run System File Checker

Open Command Prompt as Admin > Type: sfc /scannow
Restart after completion.

Why? Corrupted system files disrupt the assessment tool.

4. Check Disk for Errors

In Command Prompt (Admin), type: chkdsk /f /r
Press Y to schedule on next restart > Reboot.

Why? Disk errors can prevent proper system evaluation.

5. Reset Windows Performance Counters

In Command Prompt (Admin), run: lodctr /R
Then: winmgmt /resyncperf

Why? Resets the performance monitoring system.

6. Manually Run Assessment

Open PowerShell as Admin > Type: winsat formal
Wait 5-10 minutes for completion.

Why? Forces a fresh system evaluation.

What Causes This Error?

Corrupted performance counters
Outdated/missing drivers (especially graphics)
Disk or system file corruption
Interrupted previous assessment

Prevention Tips

✔ Keep drivers updated (check monthly)
✔ Avoid interrupting system assessments
✔ Run regular disk maintenance (Defrag HDDs, TRIM SSDs)
✔ Create restore points before major system changes

Note: Microsoft officially deprecated the Experience Index in Windows 10/11, but the assessment tool remains for compatibility. For modern performance checks, use:

Task Manager (Ctrl+Shift+Esc)
Resource Monitor (resmon)
Third-party tools like UserBenchmark