Help! sims just stays on a blue screen after opening.

lovlyloveliv​  Does that include deleting or removing the Sims 4 folder in Documents > Electronic Arts?  If you haven't at least removed it, please do so now.

If that doesn't or didn't help, please provide a dxdiag.  Click Windows key-R, enter dxdiag in the run box, wait for the scan to finish, click "Save all information," and save the file to your desktop.  From there, you can attach it to a reply using the paper clip (Attachment) icon included with the other formatting buttons.