I have update system bios from 1.2.0 to 1.3.2 and it make my Vostro 7570 boot up very slow about 40 seconds before Dell logo show up, but after Dell logo shows everything after that is fast as normal with Windows 10.
The bios version 1.3.2 was recommended to upgrade but after a day the 1.3.2 bios is gone.
So, I tried to downgrade to 1.2.0 but not success.
Anybody have this problem? How to downgrade to 1.2.0?
I'd suggest you disable any unnecessary programs (McAfee) in the Startups. Type Task manager onto search box, click Startup and then disable.
Thank you for your answer, but my problem is not in Windows. It slow after press On button, during boot up before start windows, before dell logo.