Brief description of the service and overview of purpose of Q&A
Is there a built-in way to check my hard disk in Windows?
Yes. Windows includes a built-in error checker that can go through all of the files on the local hard disk, and make sure they're all available on disk and readable. See 'Running a Disk Check in Windows'.
Is there a built-in way to take a picture of my screen (a screenshot)?
Yes. Most Windows PCs have a 'PrtScrn' key (usually located near where the 'F13' key would be). Pressing this key captures an image of the screen to the 'Clipboard'. If you subsequently open a 'Paint' program or other similar program, and select 'Paste', the image will be inserted into the currently open document.
You can also hit control-shift-s to bring up the 'snip and sketch' app.