Laptop spits around [Win 10]?

Following problem:

My laptop (ASUS brand) somehow does not seem to work properly.

Every time I turn it on, it takes a long time to start the system (load desktop, programs, etc.). Normally, that's not how it works. Furthermore, he occasionally logs out of the WLAN and has difficulties to reconnect with it. Sometimes he also says that the WLAN does not work, although it works perfectly on the mobile phone, for example.

Another problem is that when you close the laptop, as well as the function "energy saving", the PC completely shut down. This, as well as the nornale shutdown takes forever (up to 20 minutes).

Recently I checked the system for any updates and installed them all. After that, everything worked flawlessly again, but it's not working anymore.

Do you have suggestions for solutions that do not contain a complete system reset?

Appendix: Everything is set normally in the energy saving settings / schedules