New viruses, worms and Trojan horse programs are identified daily. As of October 2014, McAfee and Bitdefender are two companies, of many, that maintain online virus databases. Three of McAfee's top-tracked viruses originated in 2008, 2009 and 2010. Its website has detailed, up-to-date information on the viruses that are current threats and provides instructions on how to remove them.Know More
Computer viruses infect existing programs. This is similar to the way biological viruses need to insert themselves into a live cell to survive and reproduce. Virus writers identify weaknesses in popular software programs, such as word processing and email applications, and then create a customized virus for it. Software companies must publish frequent updates to combat viruses and address vulnerabilities. Viruses are more prevalent in PCs and Android-based devices than on Macs and iPhones.
Worms and Trojans are similar to viruses in that they seek out vulnerable computers and inflict damage once they gain access. Worms are different from viruses in that they are standalone programs that copy themselves onto other devices. Trojans are programs that appear to be helpful, fun or useful programs but actually act as back doors that allow the virus writer unrestricted access to the infected system.Learn more about Software
Like viruses in humans or animals, computer viruses work by spreading themselves, by attaching themselves to an innocuous program or computer process and replicating with the spread of information between computers. Average computer users see viruses spread through websites or email.Full Answer >
If a computer says that the security certificate has expired, the date and time on the computer need to be checked; if they are correct, a computer technician should be called to make sure that there are no viruses on the computer. The security certificate can help protect the data that is on a computer.Full Answer >
To increase upload speed, make sure that the browser is completely updated, delete unused Internet files, have an up-to-date antivirus software program, make sure that there are no viruses on the computer and use a ping test to determine if the Internet speed is near the advertised speed from the Internet service provider. If too many programs are using up the Internet connection, the upload speed will be significantly slower.Full Answer >
To transfer files between a computer and an Android phone, connect the phone to the computer via a USB cable, and drag and drop the files through the File Transfer window. Alternatively, use a cloud storage service, such as Google Drive, or a wireless transfer app, such as AirDrop.Full Answer >