How to restore fast boot windows 8 ??

Question

Windows

Good day to all! I hope very much for your help!
In general, at work, my laptop (working) (purchased by the enterprise in December 2015) with a licensed pre-installed Windows used to fly and load very quickly. Now, after the welcome screen, it also loads quite quickly, but BEFORE the welcome screen - after scrolling black dots across the screen (windows loading), the screen goes blank for a period of 40 to 90 seconds, and only after that the standard Windows welcome appears and it enters the desktop. No boot modifiers were used, I use the computer only for its intended purpose - I work on it. Of the antiviruses, Avast is the same as at home - everything is ok at home. It also costs ClassikShellMenu to start, because it is more convenient than finished tiles.
Sobsno question: what does the laptop do in these 40-90 seconds before the welcome screen ???? how to restore the download speed???
Notebook Lenovo G700 - Intel Pentium, Nvidia Geforce 920m, 4 GB RAM.
PS: the hard drive was not beaten, it seems to work normally.

Answer 1

Sobsno question: what does the laptop do in these 40-90 seconds before the welcome screen ????

No matter how surprising it is, it is loading at this time.
That is, it reads from the disk and runs programs, services, drivers.

how to restore the download speed???

Remove superfluous from autoload. Check disk for errors. The best thing to do is replace the drive with an SSD.