Privacy policy
Last updated: 11 August 2026
StallScope is an always-on tool that records how Windows is behaving, once per second. Those recordings include the names of running programs and the ports they are listening on. This page states what is recorded, where it is kept, and where it does not go.
What is recorded
Windows performance counters (CPU, memory, disk, network, page faults and others), kept per core and per drive. Alongside them, for the processes using the most resources: the executable name, the process ID, and CPU, memory, disk I/O and GPU usage. For networking: TCP connection state, the local port, the remote port, and the owning process ID.
What is not recorded
No remote IP addresses, keystrokes, screen contents, file contents, names of open files, browsing history or account information. For processes, only the executable name and resource usage are recorded — command-line arguments are not.
Where it is kept
Everything is written as files inside a folder you choose. The default retention is 14 days (28 for the stall log), after which older data is deleted automatically. You can change the location at any time from the settings window, and deleting the folder leaves nothing behind.
Network
StallScope performs no network communication. There is no server, no account, no telemetry and no analytics, and nothing recorded ever leaves the device. The one exception is update checking, where Windows asks the Microsoft Store whether a newer version exists; no user data is carried in that request.
Third parties
None. There is no recipient, and there is no data to share.
Contact
Questions about this policy can be sent through the form on the support page.