"Reclaim Windows 10" turns off a bunch of unnecessary Windows 10 telemetery, removes bloatware, and privacy invasions. Review and tweak before running. Scripts for reversing are included and commented. Forked from http://pastebin.com/gQxCUkLP

reclaimWindows10.ps1

##########
# Tweaked Win10 Initial Setup Script
# Primary Author: Disassembler <disassembler@dasm.cz>
# Original Version: 1.4, 2016-01-16
# Tweaked based on personal preferences for @alirobe 2016-03-23 - v1.4.1
# NOTE: MAKE SURE YOU READ THIS SCRIPT CAREFULLY BEFORE RUNNING IT + ADJUST COMMENTING AS APPROPRIATE
##########
 
# Ask for elevated permissions if required
If (!([Security.Principal.WindowsPrincipal][Security.Principal.WindowsIdentity]::GetCurrent()).IsInRole([Security.Principal.WindowsBuiltInRole]"Administrator")) {
  Start-Process powershell.exe "-NoProfile -ExecutionPolicy Bypass -File `"$PSCommandPath`"" -Verb RunAs
  Exit
}
 
##########
# Privacy Settings
##########
 
# Disable Telemetry
Write-Host "Disabling Telemetry..."
Set-ItemProperty -Path "HKLM:\Software\Policies\Microsoft\Windows\DataCollection" -Name "AllowTelemetry" -Type DWord -Value 0
 
# Disable Wi-Fi Sense
Write-Host "Disabling Wi-Fi Sense..."
If (!(Test-Path "HKLM:\Software\Microsoft\PolicyManager\default\WiFi\AllowWiFiHotSpotReporting")) {
  New-Item -Path "HKLM:\Software\Microsoft\PolicyManager\default\WiFi\AllowWiFiHotSpotReporting" -Force | Out-Null
}
Set-ItemProperty -Path "HKLM:\Software\Microsoft\PolicyManager\default\WiFi\AllowWiFiHotSpotReporting" -Name "Value" -Type DWord -Value 0
Set-ItemProperty -Path "HKLM:\Software\Microsoft\PolicyManager\default\WiFi\AllowAutoConnectToWiFiSenseHotspots" -Name "Value" -Type DWord -Value 0

# Disable Bing Search in Start Menu
Write-Host "Disabling Bing Search in Start Menu..."
Set-ItemProperty -Path "HKCU:\Software\Microsoft\Windows\CurrentVersion\Search" -Name "BingSearchEnabled" -Type DWord -Value 0

# Disable Location Tracking
Write-Host "Disabling Location Tracking..."
Set-ItemProperty -Path "HKLM:\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Sensor\Overrides\{BFA794E4-F964-4FDB-90F6-51056BFE4B44}" -Name "SensorPermissionState" -Type DWord -Value 0
Set-ItemProperty -Path "HKLM:\System\CurrentControlSet\Services\lfsvc\Service\Configuration" -Name "Status" -Type DWord -Value 0

# Disable Feedback
Write-Host "Disabling Feedback..."
If (!(Test-Path "HKCU:\Software\Microsoft\Siuf\Rules")) {
  New-Item -Path "HKCU:\Software\Microsoft\Siuf\Rules" -Force | Out-Null
}
Set-ItemProperty -Path "HKCU:\Software\Microsoft\Siuf\Rules" -Name "NumberOfSIUFInPeriod" -Type DWord -Value 0
 
# Disable Advertising ID
Write-Host "Disabling Advertising ID..."
If (!(Test-Path "HKCU:\Software\Microsoft\Windows\CurrentVersion\AdvertisingInfo")) {
  New-Item -Path "HKCU:\Software\Microsoft\Windows\CurrentVersion\AdvertisingInfo" | Out-Null
}
Set-ItemProperty -Path "HKCU:\Software\Microsoft\Windows\CurrentVersion\AdvertisingInfo" -Name "Enabled" -Type DWord -Value 0
 
# Disable Cortana
Write-Host "Disabling Cortana..."
If (!(Test-Path "HKCU:\Software\Microsoft\Personalization\Settings")) {
  New-Item -Path "HKCU:\Software\Microsoft\Personalization\Settings" -Force | Out-Null
}
Set-ItemProperty -Path "HKCU:\Software\Microsoft\Personalization\Settings" -Name "AcceptedPrivacyPolicy" -Type DWord -Value 0
If (!(Test-Path "HKCU:\Software\Microsoft\InputPersonalization")) {
  New-Item -Path "HKCU:\Software\Microsoft\InputPersonalization" -Force | Out-Null
}
Set-ItemProperty -Path "HKCU:\Software\Microsoft\InputPersonalization" -Name "RestrictImplicitTextCollection" -Type DWord -Value 1
Set-ItemProperty -Path "HKCU:\Software\Microsoft\InputPersonalization" -Name "RestrictImplicitInkCollection" -Type DWord -Value 1
If (!(Test-Path "HKCU:\Software\Microsoft\InputPersonalization\TrainedDataStore")) {
  New-Item -Path "HKCU:\Software\Microsoft\InputPersonalization\TrainedDataStore" -Force | Out-Null
}
Set-ItemProperty -Path "HKCU:\Software\Microsoft\InputPersonalization\TrainedDataStore" -Name "HarvestContacts" -Type DWord -Value 0

# Restrict Windows Update P2P only to local network
Write-Host "Restricting Windows Update P2P only to local network..."
Set-ItemProperty -Path "HKLM:\Software\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Config" -Name "DODownloadMode" -Type DWord -Value 1
If (!(Test-Path "HKCU:\Software\Microsoft\Windows\CurrentVersion\DeliveryOptimization")) {
  New-Item -Path "HKCU:\Software\Microsoft\Windows\CurrentVersion\DeliveryOptimization" | Out-Null
}
Set-ItemProperty -Path "HKCU:\Software\Microsoft\Windows\CurrentVersion\DeliveryOptimization" -Name "SystemSettingsDownloadMode" -Type DWord -Value 3
 
# Remove AutoLogger file and restrict directory
Write-Host "Removing AutoLogger file and restricting directory..."
$autoLoggerDir = "$env:PROGRAMDATA\Microsoft\Diagnosis\ETLLogs\AutoLogger"
If (Test-Path "$autoLoggerDir\AutoLogger-Diagtrack-Listener.etl") {
  Remove-Item "$autoLoggerDir\AutoLogger-Diagtrack-Listener.etl"
}
icacls $autoLoggerDir /deny SYSTEM:`(OI`)`(CI`)F | Out-Null
 
# Stop and disable Diagnostics Tracking Service
Write-Host "Stopping and disabling Diagnostics Tracking Service..."
Stop-Service "DiagTrack"
Set-Service "DiagTrack" -StartupType Disabled
 
# Stop and disable WAP Push Service
Write-Host "Stopping and disabling WAP Push Service..."
Stop-Service "dmwappushservice"
Set-Service "dmwappushservice" -StartupType Disabled
 
##########
# Service Tweaks
##########
 
# Raise UAC level
Set-ItemProperty -Path "HKLM:\Software\Microsoft\Windows\CurrentVersion\Policies\System" -Name "ConsentPromptBehaviorAdmin" -Type DWord -Value 5
Set-ItemProperty -Path "HKLM:\Software\Microsoft\Windows\CurrentVersion\Policies\System" -Name "PromptOnSecureDesktop" -Type DWord -Value 1
 
# Disable sharing mapped drives between users
Remove-ItemProperty -Path "HKLM:\Software\Microsoft\Windows\CurrentVersion\Policies\System" -Name "EnableLinkedConnections"
 
# Disable Windows Update automatic restart
Write-Host "Disabling Windows Update automatic restart..."
Set-ItemProperty -Path "HKLM:\Software\Microsoft\WindowsUpdate\UX\Settings" -Name "UxOption" -Type DWord -Value 1

# Stop and disable Home Groups services
Write-Host "Stopping and disabling Home Groups services..."
Stop-Service "HomeGroupListener"
Set-Service "HomeGroupListener" -StartupType Disabled
Stop-Service "HomeGroupProvider"
Set-Service "HomeGroupProvider" -StartupType Disabled

# Disable Remote Assistance
Write-Host "Disabling Remote Assistance..."
Set-ItemProperty -Path "HKLM:\System\CurrentControlSet\Control\Remote Assistance" -Name "fAllowToGetHelp" -Type DWord -Value 0
 
##########
# UI Tweaks
##########

# Disable Autoplay
Write-Host "Disabling Autoplay..."
Set-ItemProperty -Path "HKCU:\Software\Microsoft\Windows\CurrentVersion\Explorer\AutoplayHandlers" -Name "DisableAutoplay" -Type DWord -Value 1

# Disable Autorun for all drives
Write-Host "Disabling Autorun for all drives..."
If (!(Test-Path "HKCU:\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer")) {
  New-Item -Path "HKCU:\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer" | Out-Null
}
Set-ItemProperty -Path "HKCU:\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer" -Name "NoDriveTypeAutoRun" -Type DWord -Value 255
 
#Disable Sticky keys prompt
Write-Host "Disabling Sticky keys prompt..." 
Set-ItemProperty -Path "HKCU:\Control Panel\Accessibility\StickyKeys" -Name "Flags" -Type String -Value "506"
 
# Hide Search button / box
Write-Host "Hiding Search Box / Button..."
Set-ItemProperty -Path "HKCU:\Software\Microsoft\Windows\CurrentVersion\Search" -Name "SearchboxTaskbarMode" -Type DWord -Value 0
 
# Hide Task View button
Write-Host "Hiding Task View button..."
Set-ItemProperty -Path "HKCU:\Software\Microsoft\Windows\CurrentVersion\Explorer\Advanced" -Name "ShowTaskViewButton" -Type DWord -Value 0

# Show all tray icons
Write-Host "Showing all tray icons..."
Set-ItemProperty -Path "HKCU:\Software\Microsoft\Windows\CurrentVersion\Explorer" -Name "EnableAutoTray" -Type DWord -Value 0

# Show known file extensions
Write-Host "Showing known file extensions..."
Set-ItemProperty -Path "HKCU:\Software\Microsoft\Windows\CurrentVersion\Explorer\Advanced" -Name "HideFileExt" -Type DWord -Value 0

# Change default Explorer view to "Computer"
Write-Host "Changing default Explorer view to `"Computer`"..."
Set-ItemProperty -Path "HKCU:\Software\Microsoft\Windows\CurrentVersion\Explorer\Advanced" -Name "LaunchTo" -Type DWord -Value 1

# Show Computer shortcut on desktop
Write-Host "Showing Computer shortcut on desktop..."
If (!(Test-Path "HKCU:\Software\Microsoft\Windows\CurrentVersion\Explorer\HideDesktopIcons\ClassicStartMenu")) {
  New-Item -Path "HKCU:\Software\Microsoft\Windows\CurrentVersion\Explorer\HideDesktopIcons\ClassicStartMenu" | Out-Null
}
Set-ItemProperty -Path "HKCU:\Software\Microsoft\Windows\CurrentVersion\Explorer\HideDesktopIcons\ClassicStartMenu" -Name "{20D04FE0-3AEA-1069-A2D8-08002B30309D}" -Type DWord -Value 0
Set-ItemProperty -Path "HKCU:\Software\Microsoft\Windows\CurrentVersion\Explorer\HideDesktopIcons\NewStartPanel" -Name "{20D04FE0-3AEA-1069-A2D8-08002B30309D}" -Type DWord -Value 0
 
# Add Desktop icon to computer namespace
New-Item -Path "HKLM:\Software\Microsoft\Windows\CurrentVersion\Explorer\MyComputer\NameSpace\{B4BFCC3A-DB2C-424C-B029-7FE99A87C641}"
 
# Add Documents icon to computer namespace
New-Item -Path "HKLM:\Software\Microsoft\Windows\CurrentVersion\Explorer\MyComputer\NameSpace\{d3162b92-9365-467a-956b-92703aca08af}"
New-Item -Path "HKLM:\Software\Microsoft\Windows\CurrentVersion\Explorer\MyComputer\NameSpace\{A8CDFF1C-4878-43be-B5FD-F8091C1C60D0}"
 
# Add Downloads icon to computer namespace
New-Item -Path "HKLM:\Software\Microsoft\Windows\CurrentVersion\Explorer\MyComputer\NameSpace\{088e3905-0323-4b02-9826-5d99428e115f}"
New-Item -Path "HKLM:\Software\Microsoft\Windows\CurrentVersion\Explorer\MyComputer\NameSpace\{374DE290-123F-4565-9164-39C4925E467B}"
 
# Remove Music icon from computer namespace
Write-Host "Removing Music icon from computer namespace..."
Remove-Item -Path "HKLM:\Software\Microsoft\Windows\CurrentVersion\Explorer\MyComputer\NameSpace\{3dfdf296-dbec-4fb4-81d1-6a3438bcf4de}" -Recurse -ErrorAction SilentlyContinue
Remove-Item -Path "HKLM:\Software\Microsoft\Windows\CurrentVersion\Explorer\MyComputer\NameSpace\{1CF1260C-4DD0-4ebb-811F-33C572699FDE}" -Recurse -ErrorAction SilentlyContinue

# Remove Pictures icon from computer namespace
Write-Host "Removing Pictures icon from computer namespace..."
Remove-Item -Path "HKLM:\Software\Microsoft\Windows\CurrentVersion\Explorer\MyComputer\NameSpace\{24ad3ad4-a569-4530-98e1-ab02f9417aa8}" -Recurse -ErrorAction SilentlyContinue
Remove-Item -Path "HKLM:\Software\Microsoft\Windows\CurrentVersion\Explorer\MyComputer\NameSpace\{3ADD1653-EB32-4cb0-BBD7-DFA0ABB5ACCA}" -Recurse -ErrorAction SilentlyContinue
 
# Remove Videos icon from computer namespace
Write-Host "Removing Videos icon from computer namespace..."
Remove-Item -Path "HKLM:\Software\Microsoft\Windows\CurrentVersion\Explorer\MyComputer\NameSpace\{f86fa3ab-70d2-4fc7-9c99-fcbf05467f3a}" -Recurse -ErrorAction SilentlyContinue
Remove-Item -Path "HKLM:\Software\Microsoft\Windows\CurrentVersion\Explorer\MyComputer\NameSpace\{A0953C92-50DC-43bf-BE83-3742FED03C9C}" -Recurse -ErrorAction SilentlyContinue
 
##########
# Remove unwanted applications
##########
 
# Disable OneDrive
Write-Host "Disabling OneDrive..."
If (!(Test-Path "HKLM:\SOFTWARE\Policies\Microsoft\Windows\OneDrive")) {
  New-Item -Path "HKLM:\SOFTWARE\Policies\Microsoft\Windows\OneDrive" | Out-Null
}
Set-ItemProperty -Path "HKLM:\SOFTWARE\Policies\Microsoft\Windows\OneDrive" -Name "DisableFileSyncNGSC" -Type DWord -Value 1
 
# Uninstall OneDrive
Write-Host "Uninstalling OneDrive..."
Stop-Process -Name OneDrive -ErrorAction SilentlyContinue
Start-Sleep -s 3
$onedrive = "$env:SYSTEMROOT\SysWOW64\OneDriveSetup.exe"
If (!(Test-Path $onedrive)) {
  $onedrive = "$env:SYSTEMROOT\System32\OneDriveSetup.exe"
}
Start-Process $onedrive "/uninstall" -NoNewWindow -Wait
Start-Sleep -s 3
Stop-Process -Name explorer -ErrorAction SilentlyContinue
Start-Sleep -s 3
Remove-Item "$env:USERPROFILE\OneDrive" -Force -Recurse -ErrorAction SilentlyContinue
Remove-Item "$env:LOCALAPPDATA\Microsoft\OneDrive" -Force -Recurse -ErrorAction SilentlyContinue
Remove-Item "$env:PROGRAMDATA\Microsoft OneDrive" -Force -Recurse -ErrorAction SilentlyContinue
If (Test-Path "$env:SYSTEMDRIVE\OneDriveTemp") {
  Remove-Item "$env:SYSTEMDRIVE\OneDriveTemp" -Force -Recurse -ErrorAction SilentlyContinue
}
If (!(Test-Path "HKCR:")) {
  New-PSDrive -Name HKCR -PSProvider Registry -Root HKEY_CLASSES_ROOT | Out-Null
}
Remove-Item -Path "HKCR:\CLSID\{018D5C66-4533-4307-9B53-224DE2ED1FE6}" -Recurse -ErrorAction SilentlyContinue
Remove-Item -Path "HKCR:\Wow6432Node\CLSID\{018D5C66-4533-4307-9B53-224DE2ED1FE6}" -Recurse -ErrorAction SilentlyContinue
 

# Uninstall default Microsoft applications
Write-Host "Uninstalling default Microsoft applications..."
Get-AppxPackage | Where Name -NotMatch ".*(WindowsCalculator|WindowsCamera|Windows\.Photos).*" | Remove-AppxPackage
Get-AppxPackage -AllUsers | Where Name -NotMatch ".*(WindowsCalculator|WindowsCamera|Windows\.Photos|WindowsStore).*" | Remove-AppxPackage
Get-AppxProvisionedPackage -Online | Where DisplayName -NotMatch ".*(WindowsCalculator|WindowsCamera|WindowsStore).*" | Remove-AppxProvisionedPackage -Online
Get-AppxPackage -AllUsers | Where Name -NotMatch ".*(WindowsCalculator|WindowsCamera|Windows\.Photos|WindowsStore).*" | Remove-AppxPackage

# Uninstall Windows Media Player
Write-Host "Uninstalling Windows Media Player..."
dism /online /Disable-Feature /FeatureName:MediaPlayback /Quiet /NoRestart
 
# Uninstall Work Folders Client
Write-Host "Uninstalling Work Folders Client..."
dism /online /Disable-Feature /FeatureName:WorkFolders-Client /Quiet /NoRestart

# Set Photo Viewer as default for bmp, gif, jpg and png
Write-Host "Setting Photo Viewer as default for bmp, gif, jpg, png and tif..."
If (!(Test-Path "HKCR:")) {
  New-PSDrive -Name HKCR -PSProvider Registry -Root HKEY_CLASSES_ROOT | Out-Null
}
ForEach ($type in @("Paint.Picture", "giffile", "jpegfile", "pngfile")) {
  New-Item -Path $("HKCR:\$type\shell\open") -Force | Out-Null
  New-Item -Path $("HKCR:\$type\shell\open\command") | Out-Null
  Set-ItemProperty -Path $("HKCR:\$type\shell\open") -Name "MuiVerb" -Type ExpandString -Value "@%ProgramFiles%\Windows Photo Viewer\photoviewer.dll,-3043"
  Set-ItemProperty -Path $("HKCR:\$type\shell\open\command") -Name "(Default)" -Type ExpandString -Value "%SystemRoot%\System32\rundll32.exe `"%ProgramFiles%\Windows Photo Viewer\PhotoViewer.dll`", ImageView_Fullscreen %1"
}
 
# Show Photo Viewer in "Open with..."
Write-Host "Showing Photo Viewer in `"Open with...`""
If (!(Test-Path "HKCR:")) {
  New-PSDrive -Name HKCR -PSProvider Registry -Root HKEY_CLASSES_ROOT | Out-Null
}
New-Item -Path "HKCR:\Applications\photoviewer.dll\shell\open\command" -Force | Out-Null
New-Item -Path "HKCR:\Applications\photoviewer.dll\shell\open\DropTarget" -Force | Out-Null
Set-ItemProperty -Path "HKCR:\Applications\photoviewer.dll\shell\open" -Name "MuiVerb" -Type String -Value "@photoviewer.dll,-3043"
Set-ItemProperty -Path "HKCR:\Applications\photoviewer.dll\shell\open\command" -Name "(Default)" -Type ExpandString -Value "%SystemRoot%\System32\rundll32.exe `"%ProgramFiles%\Windows Photo Viewer\PhotoViewer.dll`", ImageView_Fullscreen %1"
Set-ItemProperty -Path "HKCR:\Applications\photoviewer.dll\shell\open\DropTarget" -Name "Clsid" -Type String -Value "{FFE2A43C-56B9-4bf5-9A79-CC6D4285608A}"