How do I clear temporary files in Windows?

You can clear temporary files by pressing Win + R, typing 'temp', then pressing Ctrl + A to select all files and deleting them. Alternatively, use the Windows Maintenance Tool for one-click cleaning.

How do I run System File Checker (SFC)?

Run SFC by opening Command Prompt as administrator and typing 'sfc /scannow'. This scans and repairs system files. The Windows Maintenance Tool automates this process with one click.

How do I change DNS settings to Google or Cloudflare?

Use the DNS Manager tool for one-click DNS switching. Manually, go to Network Connections, select your adapter properties, and set preferred DNS to 8.8.8.8 (Google) or 1.1.1.1 (Cloudflare).

How do I optimize Windows performance?

Use Windows Optimizer tool to adjust visual effects, disable background apps, modify taskbar settings, and manage search indexing for better system performance.

How do I flush DNS cache in Windows?

Open Command Prompt as administrator and run 'ipconfig /flushdns'. This clears the DNS resolver cache and can help resolve network connectivity issues.

LemonPyHub — Free Python Tools and Windows Utilities for Windows 10 & 11

LemonPyHub Manual & Guides
Complete guides, tutorials, and API references for mastering LemonPyHub development

This Windows System Maintenance Manual provides comprehensive guides for using LemonPyHub tools
These tools help optimize your Windows system performance.

Windows Maintenance 3.9.5 (Installer) Windows Maintenance 3.9.7 (Portable)
v3.9.7 | Windows 10 & 11

Freeware | September 2025

Installer: 10.45MB | Portable: 11.16MB
Windows Maintenance Tool 3.9.7

This Windows Maintenance Tool is designed to simplify essential system care tasks. Instead of typing complex commands in Command Prompt, you can now perform them with a single click.

Key features include:
- How to Clear all files in "temp" folder
  Win + R → temp → Ctrl + A → Delete
- How to Clear all files in "prefetch" folder
  Win + R → prefetch → Ctrl + A → Delete
- How to Clear all files in "%temp%" folder
  Win + R → %temp% → Ctrl + A → Delete
- How to Run Disk Cleanup
  Win + R → cleanmgr
- How to Empty Recycle Bin
  Win + R → shell:RecycleBinFolder → Ctrl + A → Delete
- How to Run SFC (System File Checker)
  Win + R → cmd → Ctrl + Shift + Enter → sfc /scannow
- How to Run DISM (Deployment Imaging Service and Management Tool)
  Win + R → cmd → Ctrl + Shift + Enter → DISM /Online /Cleanup-Image /RestoreHealth
- How to Release IP Address
  Admin CMD → ipconfig /release
- How to Renew IP Address
  Admin CMD → ipconfig /renew
- How to Flush DNS Cache
  Admin CMD → ipconfig /flushdns
With this tool, maintaining your Windows system becomes faster, easier, and more user-friendly — no technical expertise required.
DNS Manager (Portable)
Windows 10 & 11

Freeware | September 2025

Portable: 24.58MB
DNS Manager

DNS Manager makes it simple to switch your system DNS to Google or Cloudflare—no need to manually configure network settings. With one click, you can apply the most reliable DNS servers for faster browsing and improved privacy.

Change DNS Options:
- Google DNS (IPv4)
  Preferred: 8.8.8.8
  Alternate: 8.8.4.4
- Cloudflare DNS (IPv4)
  Preferred: 1.1.1.1
  Alternate: 1.0.0.1
- Switch DNS instantly with one click (via DNS Manager)
- Automatically applies settings system-wide
- Quick, safe, and hassle-free
Step-by-step (GUI)
1. Press Win + R, type ncpa.cpl and press Enter → opens Network Connections.
2. Right-click your active adapter (e.g. Wi-Fi or Ethernet) → choose Properties.
3. Select Internet Protocol Version 4 (TCP/IPv4) → click Properties.
4. Choose Use the following DNS server addresses and enter the addresses for Google or Cloudflare (see list above).
5. Click OK → Close. Optionally repeat for Internet Protocol Version 6 (TCP/IPv6) if you use IPv6.
6. Flush DNS cache: press Win + R → type cmd → press Ctrl + Shift + Enter to open Admin CMD → run ipconfig /flushdns.
Step-by-step (Command Prompt / netsh)
1. Open Admin Command Prompt: Win + R → type cmd → press Ctrl + Shift + Enter.
2. For Wi-Fi (replace Wi-Fi with Ethernet if wired):
3. netsh interface ip set dns name="Wi-Fi" static 8.8.8.8
  netsh interface ip add dns name="Wi-Fi" 8.8.4.4 index=2
4. Or for Cloudflare:
5. netsh interface ip set dns name="Wi-Fi" static 1.1.1.1
  netsh interface ip add dns name="Wi-Fi" 1.0.0.1 index=2
6. After running commands, run ipconfig /flushdns to clear DNS cache.
Step-by-step (PowerShell)
1. Open PowerShell as Admin: Win + X → Windows PowerShell (Admin) or press Win + R, type powershell, then Ctrl + Shift + Enter.
2. For Google DNS (replace Wi-Fi if your adapter name differs):
3. Set-DnsClientServerAddress -InterfaceAlias "Wi-Fi" -ServerAddresses 8.8.8.8,8.8.4.4
4. For Cloudflare DNS:
5. Set-DnsClientServerAddress -InterfaceAlias "Wi-Fi" -ServerAddresses 1.1.1.1,1.0.0.1
6. Flush DNS cache after changes: ipconfig /flushdns.
Notes: If you're unsure of your adapter name, run netsh interface show interface (CMD) or Get-NetAdapter (PowerShell). Replace "Wi-Fi" with the correct adapter name. If you want IPv6 addresses too, I can add those into the UI.

With DNS Manager, you can also switch between these presets automatically—no manual typing required.
Windows Optimizer (Portable)
Win7, Win8, Win8.1, Win10, Win11

Auto-Detect Windows

Freeware | September 2025

Portable: 27.24MB
Windows Optimizer

The Windows Optimizer application represents a sophisticated Windows system optimization tool designed to enhance performance through systematic configuration management. This Python-based utility leverages PowerShell commands to intelligently modify Windows Registry settings and service configurations, targeting specific system components that impact resource utilization. The application provides users with granular control over visual effects, background processes, search functionality, and UI elements, enabling tailored optimization based on individual performance requirements.

Important before you start: create a System Restore point and export registry backups. Many tweaks require Administrator rights and may need sign-out/restart or Explorer restart to take effect.

Tweaks — Step by step

1) Visual Effects (appearance vs performance)
GUI
1. Press Win + R, type SystemPropertiesPerformance.exe and press Enter.
2. In Performance Options → Visual Effects select Adjust for best performance, Adjust for best appearance, or Custom.
3. Click Apply → OK. Sign out or restart Explorer if needed.
PowerShell / Registry (current user)
```
Set-ItemProperty -Path "HKCU:\Software\Microsoft\Windows\CurrentVersion\Explorer\VisualEffects" -Name "VisualFXSetting" -Value 2 -Type DWord
    # Restart Explorer to apply:
    Stop-Process -Name explorer -Force
    Start-Process explorer
```
2) Background Apps (allow / block UWP apps)
GUI
1. Win + I → Apps (or Settings → Privacy → Background apps on Win10).
2. For each app: click the three dots → Advanced options → Background apps permissions → choose Never.
PowerShell / Registry (disable all background apps via policy)
```
# Run as Admin PowerShell
    New-Item -Path "HKLM:\SOFTWARE\Policies\Microsoft\Windows\AppPrivacy" -Force | Out-Null
    New-ItemProperty -Path "HKLM:\SOFTWARE\Policies\Microsoft\Windows\AppPrivacy" -Name "LetAppsRunInBackground" -PropertyType DWord -Value 2 -Force
    # Reboot for policy to take full effect
```
3) Taskbar Small Icon (make taskbar icons smaller)
Windows 10 (GUI)
1. Win + I → Personalization → Taskbar → turn Use small taskbar buttons On.
Windows 11 (Registry / PowerShell)
```
# set Taskbar to small icons (Windows 11)
    Set-ItemProperty -Path "HKCU:\Software\Microsoft\Windows\CurrentVersion\Explorer\Advanced" -Name "TaskbarSi" -Value 0 -Type DWord
    # Restart Explorer:
    Stop-Process -Name explorer -Force
    Start-Process explorer
```
4) Transparency Effect (enable / disable acrylic)
GUI
1. Win + I → Personalization → Colors (or Accessibility → Visual effects) → toggle Transparency effects On/Off.
PowerShell / Registry
```
# 0 = Off, 1 = On
    Set-ItemProperty -Path "HKCU:\SOFTWARE\Microsoft\Windows\CurrentVersion\Themes\Personalize" -Name "EnableTransparency" -Value 0 -Type DWord
    # Restart Explorer:
    Stop-Process -Name explorer -Force
    Start-Process explorer
```
5) Search Indexing (Windows Search)
Adjust locations (GUI)
1. Start → type Indexing Options → Open → click Modify → add/remove indexed folders.
Stop / Disable Indexer (Service)
```
# Disable Windows Search service (Admin PowerShell)
    Set-Service -Name WSearch -StartupType Disabled
    Stop-Service -Name WSearch -Force

    # Re-enable when needed:
    Set-Service -Name WSearch -StartupType "Automatic"
    Start-Service -Name WSearch
```
Note: disabling indexing reduces background disk/CPU usage but makes file searches slower.

6) Create Backup Settings (recommended before applying tweaks)
Create a System Restore point (GUI)
1. Win + R → type SystemPropertiesProtection.exe → Enter.
2. Select your system drive (usually C:) → Create → name e.g. "Before Windows Optimizer".
Create a Restore point (PowerShell — Admin)
```
Checkpoint-Computer -Description "Before Windows Optimizer" -RestorePointType "MODIFY_SETTINGS"
```
Export registry keys you will change
```
reg export "HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\VisualEffects" "%USERPROFILE%\Desktop\visualfx_backup.reg"
    reg export "HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\Advanced" "%USERPROFILE%\Desktop\taskbar_backup.reg"
    reg export "HKCU\SOFTWARE\Microsoft\Windows\CurrentVersion\Themes\Personalize" "%USERPROFILE%\Desktop\personalize_backup.reg"
    reg export "HKLM\SOFTWARE\Policies\Microsoft\Windows\AppPrivacy" "%USERPROFILE%\Desktop\appprivacy_backup.reg"
```
7) Rollback / Restore
Restore System Restore point (GUI)
1. Win + R → type rstrui.exe → Enter → follow the wizard to restore a saved restore point.
Import registry backups (if you exported .reg files)
```
reg import "%USERPROFILE%\Desktop\visualfx_backup.reg"
    reg import "%USERPROFILE%\Desktop\taskbar_backup.reg"
```
Re-enable services
```
Set-Service -Name WSearch -StartupType "Automatic"
    Start-Service -Name WSearch
```
8) Quick commands & tips
- Restart Explorer to apply many UI/registry changes: Stop-Process -Name explorer -Force; Start-Process explorer
- If unsure of adapter names / settings, test changes on a non-critical account first.
- Always create a restore point & export the registry keys you modify.
This Windows Optimizer workflow lets users safely toggle visual effects, background apps, taskbar sizing, transparency, and indexing — with easy rollback through restore points or registry imports. If you want, I can generate a ready-to-use .ps1 script (with confirmations and automatic backups) that performs these tweaks and also provides a one-click rollback option.

LemonPyHub — Free Python Tools and Windows Utilities for Windows 10 & 11

Windows Maintenance Tool 3.9.7

Key features include:

DNS Manager

Change DNS Options:

Step-by-step (GUI)

Step-by-step (Command Prompt / netsh)

Step-by-step (PowerShell)

Windows Optimizer

Tweaks — Step by step

1) Visual Effects (appearance vs performance)

2) Background Apps (allow / block UWP apps)

3) Taskbar Small Icon (make taskbar icons smaller)

4) Transparency Effect (enable / disable acrylic)

5) Search Indexing (Windows Search)

6) Create Backup Settings (recommended before applying tweaks)

7) Rollback / Restore

8) Quick commands & tips

Useful External Resources