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How to Clear the RDP Bitmap Cache (Remote Desktop Screenshots)?



RDP Bitmap Cache & remote desktop traces
What is the RDP Bitmap Cache and why should I clean it?

When you connect to another computer with Remote Desktop (mstsc.exe), the client caches parts of the remote screen locally, the portions that haven't changed since the last refresh, so it doesn't need to redraw everything over the network each time. That cache is stored per user, at %LOCALAPPDATA%\Microsoft\Terminal Server Client\Cache, and it stays on disk even after the session is closed.

This isn't metadata, it's the screen itself. Every other artifact on this site tells you a filename, a path, or a timestamp. The RDP bitmap cache stores raw bitmap tiles, typically 64x64 pixels, taken directly from what was rendered on the remote screen. Dedicated open-source tools (BMC-Tools, RdpCacheStitcher) exist specifically to piece these tiles back together into a recognizable image of what was displayed during your session. It's the closest thing on this site to an actual screenshot recovered after the fact.
What's inside the RDP Bitmap Cache?
Structure of the RDP bitmap cache Vertical layout of the RDP bitmap cache. It holds raw pixel tiles from the remote screen, each with metadata such as color depth and dimensions, stored across index and per-session cache files, with timestamps that can be correlated with other logs. All of these are removed by PrivaZer. Stored per user · persists after the RDP session closes · raw bitmap tiles, typically 64x64 pixels Bitmap tiles raw pixel fragments of the remote screen Tile metadata color depth, cache key, dimensions bcacheX.bmc index files cache index, split by quality level CacheXYZW.bin files per-session cache data File timestamps can be correlated with other logs to date a session Removed by PrivaZer

Field What it reveals Processing by PrivaZer
Bitmap tiles Actual visual fragments of the remote screen Removed
Tile metadata How to interpret and reassemble each tile Removed
Index (.bmc) files Which tiles belong together Removed
Cache (.bin) files The bulk of the cached image data, per session Removed
Timestamps Roughly when a given session took place Removed

On its own, one tile is meaningless, a small grid of pixels. Stitched together with the rest of the cache, they can form a recognizable image of what was on the remote screen, potentially including anything that was visible during that session. PrivaZer clears the entire cache directory so there's nothing left to stitch.

Does PrivaZer clean the RDP Bitmap Cache?

Yes. PrivaZer removes the entire Terminal Server Client\Cache folder for your account, covering both the index files and the cache data files in one pass. It's per-user data under your own AppData folder, so no administrator rights are required, and no reboot is needed.

Does the RDP Bitmap Cache survive after I close the session?

Yes, and that's explicitly by design, the cache is meant to persist so future sessions to the same server can benefit from it. Closing Remote Desktop, disconnecting, or even the remote server going offline doesn't clear these files. They can sit on disk indefinitely until reused, overwritten, or cleaned.

Is it safe to clean the RDP Bitmap Cache?

Yes. Clearing it doesn't affect your files, your installed programs or system stability, and it has no effect on the remote computer at all, only the local cache. The only visible effect is that your next Remote Desktop session to a given server may redraw slightly more data over the network at first, since it can't reuse the old cached tiles, until a fresh cache builds up.

Will the RDP Bitmap Cache come back after cleaning?

Yes, your next Remote Desktop session starts building a fresh cache right away, that's normal, expected behavior for a performance feature. Run PrivaZer periodically, or after any sensitive remote session, to keep it cleared.

How is this different from the other traces on this site?

Windows Timeline can name a document you opened. OpenSaveMRU can name a file you saved. Amcache can name a program you ran. None of them show you what any of it looked like. The RDP bitmap cache is the one artifact on this site that stores actual visual content rather than a description of an event, which is exactly why dedicated reconstruction tools exist for it and not for the others.

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For advanced users
Scan options - Other histories - Remote desktop Cache
How to clear the RDP bitmap cache on Windows (Remote Desktop screenshots)
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