Hi grace
My name is Fernando. I am an Independent Advisor. I am here to guide you with rebuilding Pagefile.sys.
Thanks to https://itstillworks.com/fix-corrupted-file-848...
Press the "R" key plus the Windows key at the same time. This will open the Run tool.
Type "cmd" in the open field and click "OK" to launch the Command Prompt.
Copy the following command and paste it at the prompt: "sfc /scannow"
Allow the System File Checker to detect the corrupted page files and restore them.
I hope this helps. Feel free to ask me any questions and let me know how it goes.
Respectfully,
Fernando Y.