add basic pagefile viewing directions

src/content/docs/factoids/pagefile.md

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+---
+title: Viewing the Pagefile location and status
+description: The pagefile in Windows is virtual memory, extending the physical RAM by writing memory to disk when RAM is full or an item is not in use.
+---
+
+1. Press Win + R to open the Run dialog.
+2. Type `sysdm.cpl` and press Enter.
+3. Click the **Advanced** tab.
+4. In the **Performance** section, click on **Settings**.
+5. Go to the **Advanced** tab.
+6. Under the **Virtual memory** section, click on Change.