Crashing upon start up. Tried different fixes. HELP

The blue box doesn’t appear when starting up. I get a box that says starting GMod like it should then the top of the blue box opens and quickly disappears. I tried typing dxlevel1 in properties. I looked for iobid icon. Not on my computer. Reinstall steam and gmod. I believe it may have something to do with dx not enabled. But I don’t know how to enable them. Tried the different ways YouTube suggested. My son is depending on me. Help me. Thank you all