System
RDP Bitmap Cache
Remote Desktop Connection stores a persistent bitmap cache under the Terminal Server Client Cache folder so it can reuse previously drawn screen regions instead of downloading them again over RDP. These cache files hold compressed bitmap tiles for windows, icons, text regions, and other rendered interface elements from past sessions, which speeds up redraws on slow links but can become stale or oversized over time. Kudu removes the local RDP bitmap cache files only, leaving saved connections, credentials, settings, and remote data untouched.
Why clean RDP Bitmap Cache?
- Stale bitmap tiles from an earlier remote session can be reused incorrectly, showing wrong icons, old window contents, or visual remnants until the screen is forced to repaint
- Corrupted cache blocks make parts of the remote desktop render as black boxes, garbled rectangles, or missing UI elements during reconnects
- After a server-side app update or theme change, cached screen regions may no longer match what the host is drawing, so menus and toolbars can appear visually inconsistent until refreshed
- An oversized Terminal Server Client cache wastes local disk space while storing bitmap tiles for systems you no longer connect to, with no benefit to current sessions
- When cached bitmaps are invalid or incomplete, scrolling and window moves trigger repeated redraw glitches and noticeable flashing as the client falls back to re-requesting screen data
- Cleaning the cache can resolve persistent display artifacts that survive disconnecting and reconnecting because the bad bitmap tiles are stored on disk, not just in memory
What gets cleaned
Cache paths Kudu targets
Windows
%LocalAppData%/Microsoft/Terminal Server Client/Cache |
Frequently asked
Common questions about RDP Bitmap Cache
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