windows 10 suddenly very slow; videos all freeze repeatedly

[boydphoto]

Tech Support Guy System Info Utility version 1.0.0.4
OS Version: Microsoft Windows 10 Home, 64 bit
Processor: Intel(R) Pentium(R) Silver N5000 CPU @ 1.10GHz, Intel64 Family 6 Model 122 Stepping 1
Processor Count: 4
RAM: 3927 Mb
Graphics Card: Intel(R) UHD Graphics 605, 1024 Mb
Hard Drives: C: 448 GB (361 GB Free); D: 16 GB (1 GB Free);
Motherboard: HP, 84D4
Antivirus: Avast Antivirus, Enabled and Updated

 

[lunarlander]

Something must have changed. Did you download and install a new program ?

Right click on task bar, choose Task Manager, go to Startup tab and disable all programs you don't use.

Go to Settings > Privacy > Background apps and turn off everything you don't need running in the background.

 

[boydphoto]

After posting this, I reset my laptop with new installation of Windows. It now does THE SAME THINGS! How can this be? I'm completely confused. Please help me.
Thanks, Boyd.

 

[lunarlander]

Uninstall AVAST. Some third party antivirus programs don't work well with Windows 10. Especially because Windows 10 has a major update every half year.

If you have re-installed all of your software. Try uninstalling them one by one. And see if improvement is noticed.