Instructions to find virus using dos?

To find a virus using DOS, you can start by running a full system scan with an antivirus tool that supports command-line operations, like Symantec's Norton or McAfee. Open the Command Prompt by typing cmd in the Run dialog (Win + R). Navigate to the directory of your antivirus program using the cd command, and then execute the scanning command, which typically looks like avscan /scan /all (replace "avscan" with the actual executable name). Additionally, you can look for suspicious files or processes using commands like dir to list files and tasklist to view running processes.