Hi,
Every now and then my computer slows to a crawl. Its shows the same symptoms as the high memory usage thread, but is an issue with the "WithSecure Pisces Hoster"
Anything I can do to get rid of this issue?
Steve
Pisces is a component that scans archive files, and this is an indication that there is a scan ongoing at the moment. If you did not initiate this yourself then it's possible that a manual scan was started by an administrator. If the high CPU usage continues for a long time then it's possible you have a lot of archives on the device, or there is very little free disk to extract contents for scanning?
Under the manual scanning settings there are some options which could help:
If this happens continuously it would be possible that somehow manual scans are configured to happen too frequently, for example daily rather than monthly.
However if this does not lead to a solution I would recommend using the diagnostic tool to produce a diagnostic file and making a support request so that our experts can investigate what is causing it.
⚠️ Archived — F-Secure Pisces Hoster (EOL)
This thread refers to WithSecure Pisces Hoster, a scanning component in the F-Secure Client Security product line, which reached end of support on 11 May 2026. Update delivery for these versions has been discontinued.
If you are experiencing high CPU usage with a current WithSecure Elements endpoint agent, Pisces Hoster is not a component of those versions. Please open a new post with your Elements Agent version and the process name shown in Task Manager.
Last reviewed: May 2026.
