sfc: add page

pages/windows/sfc.md

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+# sfc
+
+> Scans the integrity of Windows system files.
+
+- Display information about the usage of the command:
+
+`sfc`
+
+- Scan all system files and, if possible, repair any problems:
+
+`sfc /scannow`
+
+- Scan all system files without attempting to repair any:
+
+`sfc /verifyonly`
+
+- Scan a specific file and, if possible, repair any problems:
+
+`sfc /scanfile={{path/to/file}}`
+
+- Scan a specific file without attempting to repair it:
+
+`sfc /verifyfile={{path/to/file}}`
+
+- When repairing offline, specify the boot directory:
+
+`sfc /offbootdir={{path/to/dir}}`
+
+- When repairing offline, specify the Windows directory:
+
+`sfc /offwindir={{path/to/dir}}`