: Run sfc /scannow to repair corrupted system files.
: Before opening, upload the file to VirusTotal , which checks the archive against dozens of different antivirus engines. system check.rar
: Some developers package custom hardware testing scripts or "PC health" tools into archives. These are often used by niche communities to share automated benchmarks or log-gathering tools. : Run sfc /scannow to repair corrupted system files
: If you must open it, use a tool like WinRAR or 7-Zip to "View" the contents without extracting. If you see an .exe file inside a "system check" archive, it is almost certainly a virus. Alternative: Safe System Checks upload the file to VirusTotal