Windows and Visual Studio slloooooooowwwww

I still experience in visual Studio alot of (Not responding) freezes, too much, and at the same time I also notice that Explorer is getting slow as well.

This is a frustratingly common issue in Windows 11, often described as the "auto-refresh bug" or simply "Explorer lag." When you create, delete, or rename a file, the view doesn't update immediately, forcing you to press F5 or wait.

Since you asked specifically how to investigate (rather than just "try these random fixes"), here is a systematic approach to isolating the bottleneck, moving from the most likely culprits to deeper system diagnostics.

Phase 1: The Usual Suspects (External Conflicts)

Most often, Explorer isn't slow because of Windows itself, but because something hooked into Explorer is hanging.

1. Investigate the "Cloud" Sync

File Explorer waits for status confirmations from cloud storage services before updating the view.

• The Test: Temporarily Quit OneDrive (and Google Drive/Dropbox if installed). Look for the cloud icon in your system tray (near the clock), right-click, and select "Pause Syncing" or "Quit OneDrive".

• The Result: If the lag disappears immediately, the issue is the sync client, not Windows. You may need to reset the OneDrive cache or keep the files "Always available on this device" to stop the constant status polling.

2. The "Quick Access" Bottleneck

Explorer constantly indexes your most used files to populate "Quick Access" and "Home." If this database is corrupt or points to a disconnected network drive, it freezes the entire view update mechanism.

• The Test:

  1. Open Explorer 1$\rightarrow$ Click the ... (three dots) on the toolbar 2$\rightarrow$ Options.3

  2. Under General, change "Open File Explorer to:" from Home (or Quick Access) to This PC.4

  3. Under Privacy, click the Clear button next to "Clear File Explorer history."5

  4. Crucially: Uncheck "Show recently used files" and "Show frequently used folders."6

Phase 2: Deep Diagnostics (Shell Extensions)

This is the most powerful investigative step. "Shell Extensions" are the right-click menu items added by tools like WinRAR, Adobe, or Antivirus software. If one is poorly coded, it can hang the Explorer process.

1. The "Clean Boot" Investigation

• How to do it:

  1. Press Win + R, type msconfig, and hit Enter.7

  2. Go to the Services tab, check Hide all Microsoft services, and then click Disable all.8

  3. Go to the Startup tab (Task Manager) and disable all startup items.

  4. Restart.9

• Analysis: If the speed returns, you know a 3rd party app is the cause. You can re-enable them one by one to find the culprit.

2. The Surgical Tool: ShellExView

For a more precise investigation without rebooting, use the industry-standard tool ShellExView (by NirSoft).

• The specific check:

  1. Download and run ShellExView.

  2. Go to Options $\rightarrow$ Filter by Extension Type $\rightarrow$ select Context Menu.

  3. Sort by Microsoft column to group all non-Microsoft extensions together.

  4. Select all "No" (non-Microsoft) entries (pink background) and disable them (press F7).

  5. Restart Explorer (Ctrl+E in ShellExView).

  6. If the lag is gone, re-enable them in batches until the lag returns to identify the specific bad extension.

Phase 3: The "Indexing & Folder Type" Glitch

Windows 11 has a specific bug where it treats folders with mixed content as "Pictures" folders, trying to generate thumbnails for thousands of files, which kills update speed.

1. Check Folder Optimization

• The Test: Right-click the folder where you notice the lag (e.g., Downloads) 10$\rightarrow$ Properties 11$\rightarrow$ Customize tab.12

• The Fix: Ensure "Optimize this folder for:" is set to General items.13 If it was set to "Pictures" or "Videos," this was likely your cause. Check "Also apply this template to all subfolders."14

2. Rebuild the Search Index

A corrupted index database causes Explorer to pause while trying to write changes to the index.

• Action: Press Win key, type "Indexing Options," click Advanced $\rightarrow$ Rebuild. (Note: This can take a while).

Phase 4: System File Integrity

If none of the above reveals the cause, the system DLLs managing the UI might be corrupted.

• Run the Repair Command:

  Open Terminal (Admin) or CMD (Admin) and run this command specifically for image health:

  $$DISM.exe /Online /Cleanup-image /Restorehealth$$

  Followed by:

  $$sfc /scannow$$

Summary of Investigation Path

Would you like me to walk you through using ShellExView to pinpoint a specific rogue extension?

File Explorer Is Slow to Open in Windows 11/10 [FIXED]

The linked video provides a visual walkthrough of the exact optimization steps discussed, including clearing the history, changing the folder optimization settings, and restarting the Explorer process to apply changes.