According to Screensavers Planet, downloading and installing screensavers can be potentially dangerous, but there are precautions to take to make it as safe as possible. By using trusted sources, paying attention to installation instructions and running anti-virus software, the risks are reduced.
Screensaver installation windows may have steps that ask the user to agree to install extra programs or software which could be dangerous malware. Reading every step of the installation process thoroughly can help prevent this. Screensaver Planet also states that, while screensavers themselves are typically harmless, not all screensavers are compatible with all operating systems, and installing an incompatible program could potentially cause problems.