If you encounter a Switch system update error, try these steps. First, check your internet connection—switch to a wired connection via an Ethernet adapter for stability. Restart your router by unplugging it for 30 seconds, then plugging it back in. If the update fails at a specific percentage, wait 30 minutes—large updates can stall temporarily. Free up storage space: delete unused games or files to ensure at least 1GB of free space. Perform a soft reset: hold the power button for 15 seconds to turn off the console, then restart and try the update again. If the error persists, download the update manually from Nintendo’s website: transfer the file to a microSD card, insert it into the Switch, and enter Maintenance Mode (hold power + volume up + volume down) to apply the update. Contact Nintendo Support if manual update fails.