Geri's computer is taking forever to open files. She's thinking that she has to reinstall Windows to get it running right. Leo says that may be the best option as the hard drive may be hard to read in the current configuration. Formatting the hard drive and reinstalling Windows will get it back to it's clean and tidy condition. She should back up her data first, though.
She can run the Windows Install and choose the "repair" option first. If that doesn't work, then it may require a reinstall of Windows. She may want to get a new hard drive as well.