So i need help somthing weird happened after a windows 11 update

Troubleshooting Post-Update Performance Issues in Windows 11: What to Do When Your System Acts Erratically

Many Windows 11 users have experienced unexpected system behavior following recent updates. If you’re noticing slow startup times, brief flashes of command prompt windows, or unusual CPU activity, you’re not alone. Here’s a comprehensive guide to understanding and addressing these issues.

Recognizing Post-Update Performance Anomalies

After installing a Windows 11 update, some users report that their PCs first display sluggishness, taking around 10 seconds or more to reach the desktop. This initial lag can be followed by sporadic, brief appearances of command prompt windows that quickly vanish. Simultaneously, the system seems to regain normalcy, causing confusion about whether these behaviors are normal or indicative of underlying problems.

Troubleshooting Steps

1. Monitor System Resources

Open Task Manager (Ctrl + Shift + Esc) and observe CPU, memory, disk, and GPU usage during these events. An intermittent spike in CPU usage—lasting only a second—may occur without any apparent cause, while GPU activity remains minimal or zero.

1. Check for Background Processes

The transient command prompt windows could be related to system processes, scheduled tasks, or background services initiating during startup. These may be part of the update process or system maintenance activities.

1. Run Comprehensive Security Scans

Even if your antivirus (e.g., Kaspersky) reports no threats, consider performing additional malware scans with tools like Windows Defender Offline or Malwarebytes to rule out any malicious activity.

1. Update Device Drivers

Ensure all hardware drivers, especially graphics card drivers, are up to date. Outdated or incompatible drivers can contribute to performance issues or unusual system behavior.

1. Review Windows Updates

Check the Windows Update history for recent patches. Sometimes, updates include fixes or adjustments that temporarily affect system performance. Microsoft often releases subsequent patches to address such glitches.

1. Perform System Maintenance

2. Run the built-in Troubleshooter for performance issues.

3. Use the System File Checker (sfc /scannow) to detect and repair corrupted system files.

4. Utilize the Deployment Image Servicing and Management tool (DISM /Online /Cleanup-Image /RestoreHealth) to fix Windows image issues.

5. Consider Clean Boot and Event Viewer Analysis

Performing a clean boot can help identify if third-party apps are causing the slowdown. Additionally, examine the Event Viewer