Windows 10 offers "Keep my files" and "Remove everything" reset options. "Keep my files" preserves personal files while removing installed apps. "Remove everything" completely erases all data and performs clean install
Simple deletion or formatting doesn't permanently delete files. Professional data recovery software can recover formatted files. Wiping needed when storage space remains occupied. Required to remove viruses or fix malfunctioning drives
Data wiping permanently erases all files, including accounts and applications. Back up valuable data using external drives or OneDrive. Encrypt SSD using BitLocker or third-party encryption tools
iCloud deletion removes data from all devices synced to same account. iCloud settings must be enabled for this method to work. Most Apple apps and some third-party apps can be deleted through iCloud
Launch Disk Utility from Launchpad. Insert DVD and select "completely" or "quickly" erase. Process takes minutes to an hour depending on deletion type
Formatting erases all data and reinstalls Windows or macOS. Windows 10 formatting is permanent, requiring data backup first. Formatting process can take several minutes to hours. Windows 8.1 formatting reverts to Windows 8, but offers free upgrade