Think your PC might be infected but don't want to install another antivirus? F-Secure Online Scanner does a one-time check for malware, viruses and spyware, runs from a downloaded executable, and the scan leaves no scanner behind on the computer.
The scanner checks for malware, viruses, and spyware
F-Secure Online Scanner is an on-demand tool for finding and removing malicious software already on a PC. Its scan covers viruses, malware, and spyware, then removes threats it finds. The tool is intended for an occasional cleanup check; it does not provide ongoing, real-time monitoring.
Run the downloaded executable to start a scan
The scan starts from the downloaded .exe file. F-Secure advises removing other antivirus programs before using the scanner, and says the tool keeps the computer protected while its scan is running. Afterward, the scan does not leave anything on the computer.
- Download and open the scanner executable.
- Let it check for threats and remove anything it detects.
Use it for a one-time cleanup
It is a good second opinion when something seems wrong, but it is not a replacement for a permanent antivirus.
Pros
- Detects and removes malware, viruses, and spyware
- Runs as a one-time scan from a downloaded executable
- Leaves no scanner behind after the scan
Cons
- No real-time protection; it only scans when you run it
- F-Secure advises removing other antivirus programs before scanning
System requirements: Windows 10, Windows 11 · ARM64 and x64
Does F-Secure Online Scanner stay installed?
No. It runs from the downloaded file and leaves nothing behind after the scan.
Do I need to remove my current antivirus first?
F-Secure recommends uninstalling other antivirus programs before running the scan.