| Installation Type | Effect on System Drive (C:) | Effect on Other Drives/Partitions | |------------------|------------------------------|------------------------------------| | | Windows replaced; personal files in Windows.old folder | Unaffected | | Upgrade (Keep personal files only) | Windows replaced; apps removed; files in Windows.old | Unaffected | | Clean install – Format partition | All data on selected partition is wiped | Unaffected (if other partitions untouched) | | Clean install – Delete partition & recreate | All data on that specific drive partition is wiped | Unaffected (other partitions/drives remain intact) | | Clean install – Select unallocated space | Windows creates new partitions; no prior data (space was empty) | Unaffected | | Install via USB/DVD – Manual partition selection | User decides which partition(s) to format/delete | Unaffected unless user explicitly formats/deletes them |
October 26, 2023 Subject: Analysis of data retention during Windows OS installation does windows install wipe all drives
If a user deletes a partition to create a new one (often done to remove old system clutter), the data within that partition is lost. Windows marks the space as "Unallocated." | Installation Type | Effect on System Drive