Error boot device after upgrading to Windows 10

[rose0521]

Hi,

My laptop had been upgraded automatically to Windows 10 about 3 days ago. It was fine, but last night it had a weird sound and stopped working suddenly. I restarted my laptop but it showed a pop up notification:
"boot device not found- please install an operating system on your hardisk".

This morning I took my laptop to IT Help Desk in my university, but strangely I could boot it and login to my windows without any error notification altough it took longer than usual (around 15 minutes).  

What do I need to do with my laptop? It seems working normally now but I am worried it will freeze again suddenly. Besides, is anyone know whether I can use my warranty in the UK if I purchased my laptop in my origin country?

Thank you.

[SDJL · Accepted solution]

HI @rose0521,

Welcome to HP Forums! I have read your post and wanted to help.

I understand that once your laptop cannot start with error message "boot device not found", and now is recovered, but you want to confirm that there is no issue with the laptop.

You can follow the document  below to test the laptop hardware:

HP Notebook PCs - Testing for Hardware Failures (Windows 10, 😎

If you want to contact HP support to check if the warranty covers the service in UK, please click http://www8.hp.com/us/en/contact-hp/ww-phone-assist.html to get the contact information.

Please let me know if this resolves the issue by marking this post as "Accept as Solution".  To simply say thanks, click the Thumbs up below!  🙂  If you require further assistance let me know and I will gladly do all I can to help. Thanks.

Regards,