Startup Problem And Shutting down instantly

May be this issue occurs due to the corrupted System file. Install windows iso image from official page and boot to the usb and reinstall windows without erasing your old data.

If your Acer Aspire 3 shows the welcome logo and then shuts down instantly, the problem is usually related to power, overheating, or a hardware fault. First, disconnect the charger and remove all external devices like USB drives. Hold the power button for about 20 seconds to perform a power reset, then try turning the laptop on again. If the issue continues, check the RAM by reseating it because loose memory can cause sudden shutdowns during startup. Also make sure the cooling vents are not blocked or full of dust, as overheating may force the system to shut down. If none of these steps work, the battery, charger, or motherboard may need professional inspection.