Same issue as here. So today I got my Dell Inspiron 15 7577 gaming for dust cleanup. Now when I turn on my laptop, it gets stuck at the Dell logo and after 50 60 seconds it starts loading, then the laptop boots up to Windows. If I turn off the laptop using the power button while it is stuck on Dell logo and start it again, it boots up immediately to Windows without the 50 60 seconds wait. Can someone tell me what the problem is?