There are several free online scanners available online. The easiest and safest way is to choose a free tool from a trusted cyber security provider for safe scanning. You can usually use these even if you have an antivirus software installed already.
Most commonly, you run a free online scanner tool directly from the company's web page and follow the instructions. It will let you know if you have any viruses and remove them for free. You should choose a free online scanner tool from a reputable cyber security brand.
Make sure that the free online virus scanner you want to use is from a respected cyber security company. Before running any online virus scanner, check carefully that the website address is trusted and reliable.