If your icons are huge, hold Ctrl and scroll down until they return to “Medium Icons” size.
Windows stores icon images in a hidden database file: IconCache.db . When this file becomes corrupt (after driver updates, sudden shutdowns, or system file conflicts), Windows falls back to a default rendering mode — often rendering icons at 256x256 pixels even when set to “Medium.” icons huge on desktop
You probably did this without knowing. On the desktop: If your icons are huge, hold Ctrl and
Clean boot Windows (disable all non-Microsoft services via msconfig). If the problem disappears, re-enable services one by one. If your icons are huge