ASUS VivoBook 15 Intel Core i5 1335U Slow Boot Fix Windows 11

Your ASUS VivoBook 15 Intel Core i5 1335U takes a long time to start – the boot process from pressing the power button to the Windows 11 desktop ready for use exceeds 60 seconds when it should take under 25 seconds. Startup app management, Fast Startup settings, and SSD health restore normal boot speed on the VivoBook 15.

This guide covers startup app management, Fast Startup configuration, and performance optimization for the ASUS VivoBook 15 Intel Core i5 1335U in Windows 11.

“VivoBook 15 Core i5 1335U took 3 minutes to boot. Task Manager startup tab showed 12 apps including Teams, OneDrive, Spotify, and Dropbox all launching at startup. Disabled unnecessary ones and boot time dropped to 20 seconds.” – Haslinda, administrative officer from Johor Bahru

Why ASUS VivoBook 15 Boots Slowly

Boot time on the VivoBook 15 increases when many applications are configured to start automatically with Windows. Each startup application initializes its processes during boot, competing for CPU and SSD read access on the Intel Core i5 1335U. Applications like Microsoft Teams, Adobe Creative Cloud, and cloud storage clients add 5-15 seconds each during their simultaneous startup initialization phase. When 8-12 startup applications all initialize concurrently, even the fast i5 1335U spends its boot period servicing startup app reads from the SSD rather than completing Windows initialization.

• Excessive startup applications loading simultaneously during Windows initialization
• Windows Update restart pending – incomplete update causes extended first-boot processing
• Antivirus scheduled scan or definition update triggered at Windows startup
• SSD health degraded causing slower read performance during OS file loading

Fix 1 – Disable Startup Apps in Task Manager

Press Ctrl+Shift+Esc to open Task Manager and click the Startup apps tab (or Startup in older Task Manager views). Review each listed application and its Startup impact rating. Right-click and Disable applications with High or Medium impact that are not essential for work – commonly Teams, Discord, Spotify, Adobe Creative Cloud updater, OneDrive (if not actively needed), Dropbox, and printer manufacturer software. Disabling one High-impact startup app can reduce boot time by 10-20 seconds. Keep security software enabled. Restart to measure the improvement.

Fix 2 – Enable Fast Startup

Go to Settings – System – Power – Additional power settings – Choose what the power buttons do. Click Change settings that are currently unavailable. Check Turn on fast startup (recommended). Save changes. Fast Startup writes the Windows kernel session to a hibernation file on shutdown, allowing the next boot to load the kernel from the saved state rather than initializing it from scratch. This reduces boot time by 30-50 percent on the VivoBook 15 without the full hibernation of all user applications – programs still restart fresh while the OS kernel initializes in under 5 seconds from the saved state.

Enable Fast Boot in ASUS BIOS

Restart and press F2 for BIOS setup on the VivoBook 15. Find Boot – Fast Boot option and enable it. BIOS Fast Boot reduces POST time by skipping non-critical hardware initialization steps during startup – USB device enumeration delay, memory training recalculation, and option ROM scans. Enabling both Windows Fast Startup and BIOS Fast Boot achieves the shortest possible total boot time from power button press to Windows desktop ready state on the ASUS VivoBook 15 Intel Core i5 1335U.

Fix 3 – Complete Pending Windows Updates

Go to Settings – Windows Update and install all pending updates. Restart when prompted. After all updates complete, restart once more to ensure no background update processing remains. Windows Update can cause slow boot when updates are partially applied – Windows runs update finalization tasks during boot that significantly extend the time to reach the desktop. After all updates and a clean restart, boot time returns to the VivoBook 15 baseline.

Fix 4 – Check SSD Health

Download CrystalDiskInfo from the developer website and run it on the VivoBook 15. Check the overall health status of the NVMe SSD. A Good status with high Reallocated Sector Count (attribute 05) or Pending Sector Count (attribute C5) indicates the SSD has bad sectors that cause read retries during boot, dramatically slowing OS file loading. An SSD with declining health needs replacement before it causes data loss. For an SSD in Good health with no warning attributes, the boot speed issue is software-related and addressed by the startup app and Fast Startup fixes above.

Frequently Asked Questions

Why is ASUS VivoBook 15 Intel Core i5 1335U booting slowly?

Too many startup apps loading concurrently. Disable High-impact startup apps in Task Manager – Startup tab. Enable Fast Startup in Power Options for 30-50 percent boot time reduction.

How do I speed up boot time on ASUS VivoBook 15?

Disable startup apps in Task Manager, enable Fast Startup in Power Options, enable BIOS Fast Boot, complete all pending Windows Updates.

Does ASUS VivoBook 15 Intel Core i5 1335U have Fast Boot?

Yes – Fast Boot in BIOS and Fast Startup in Windows 11 Power Options. Enable both for shortest boot time from power-off to desktop.

How long should ASUS VivoBook 15 take to boot?

15-25 seconds from power button to desktop with NVMe SSD, Fast Startup enabled, and minimal startup applications on the Core i5 1335U.

Conclusion

ASUS VivoBook 15 Intel Core i5 1335U slow boot in Windows 11 is resolved by disabling unnecessary High-impact startup applications in Task Manager and enabling Windows Fast Startup in Power Options. BIOS Fast Boot option reduces POST time for the fastest total startup sequence. Completing pending Windows Updates eliminates update finalization processing that extends first-boot time after update installation. SSD health check via CrystalDiskInfo identifies hardware degradation causing slow read performance during OS file loading.