A.8.2 What does PuTTY leave on a system? How can I clean up after it?

PuTTY will leave some Registry entries, and a random seed file, on the PC (see question A.5.2). Windows 7 and up also remember some information about recently launched sessions for the ‘jump list’ feature.

If you are using PuTTY on a public PC, or somebody else's PC, you might want to clean this information up when you leave. You can do that automatically, by running the command putty -cleanup. See section 3.8.2 in the documentation for more detail. (Note that this only removes settings for the currently logged-in user on multi-user systems.)

If PuTTY was installed from the installer package, it will also appear in ‘Add/Remove Programs’. Current versions of the installer do not offer to remove the above-mentioned items, so if you want them removed you should run putty -cleanup before uninstalling.