The System Menu shouldn't load when booting Wii ISOs and WADs directly, if they're not launching directly, your emulated NAND is likely corrupt. Try going into Tools => Manage NAND => Check NAND. If that doesn't fix it, try Tools => Perform Online System Update => Current Region.
If none of that works you'll probably need to start fresh. Backup your save data first then go to This PC => Documents => Dolphin Emulator and delete the "Wii" subfolder...
If none of that works you'll probably need to start fresh. Backup your save data first then go to This PC => Documents => Dolphin Emulator and delete the "Wii" subfolder...
Avell A70 MOB: Core i7-11800H, GeForce RTX 3060, 16 GB DDR4-3200, Windows 11 (Insider Preview)
ASRock Z97M OC Formula: Pentium G3258, GeForce GT 440, 16 GB DDR3-1600, Windows 10 (22H2)
ASRock Z97M OC Formula: Pentium G3258, GeForce GT 440, 16 GB DDR3-1600, Windows 10 (22H2)