Why does my computer say i have a virus but my scanner says i don't?

Your computer might be displaying a virus warning due to a false positive, which can happen if the software detects a benign file as harmful. Additionally, some malware can masquerade as legitimate software, causing alerts without being detected by standard scanners. It's also possible that the warning is from a different application or source that isn't reliable. To resolve this, consider updating your antivirus software, running a full system scan, and using a second opinion scanner for verification.