• use this one first
• right-click disk > properties > Disk Cleanup > Run as Admin

cleanmgr /?
sudo cleanmgr /verylowdisk

• https://www.wisecleaner.com/wise-disk-cleaner.html
• https://portableapps.com/apps/utilities/wise-disk-cleaner-portable - clean and defrag

• https://www.bleachbit.org/
• choose only browser cache and vaccum

choco install bleachbit.install
if exist "%ProgramFiles(x86)%\BleachBit\bleachbit_console.exe" cd "%ProgramFiles(x86)%\BleachBit"
if exist "%ProgramFiles%\BleachBit\bleachbit_console.exe" cd "%ProgramFiles%\BleachBit"
 
bleachbit_console --clean adobe_reader.cache adobe_reader.tmp chromium.cache ^
  firefox.backup firefox.cache firefox.crash_reports firefox.vacuum ^
  flash.cache flash.cookies gimp.tmp google_chrome.cache google_chrome.vacuum internet_explorer.cache ^
  internet_explorer.logs java.cache microsoft_edge.cache microsoft_edge.vacuum ^
  microsoft_office.debug_logs opera.cache opera.vacuum safari.cache safari.vacuum ^
  system.logs system.recycle_bin system.tmp system.updates windows_defender.backup ^
  windows_defender.history windows_defender.logs windows_defender.quarantine windows_defender.temp

• Custom Clean > except cookies
• Tools > Uninstall > Save to text file > Uninstall all craps
• Tools > Startup > Save to text file > Stop all craps

choco install ccleaner.portable

cd %programfiles(x86)%

• https://www.oo-software.com/en/shutup10
• Action > Apply only recommended settings

choco install shutup10
oosu10

• https://portableapps.com/apps/utilities/wise-data-recovery-portable

takeown /f <foldername> /r /d y   # take ownership to current user
takeown /f <foldername> /a /r /d y  # take ownership to administrator

icacls C:\drv /grant "%USERDOMAIN%\%USERNAME%":F /t
icacls C:\drv <filename> /grant administrators:F