Yes, you can do so in registry settings. However where it's located very much depends on the version of Windows you are using. Please feel free to message me and I'll help as best I can.
You would have to reboot your computer and disable the Fun keys in BIOS in Windows 8.
You can use Windows Defender to disable programs that run at startup, or using System Configuration.
Either disable the dhcp scope, or remove the service.
u can use a software named CCLEANER to disable/enable startup
Search narrator.Exe en rename it to e.g. narrator.old
This is sadly not possible in Windows any more.
There are many websites that teach people how to disable the HomeGroup function on Windows 8. Some examples of websites are TechRepublic and How-To Geek.
Yes, windows search will work.
Software Explorer
Software Explorer
Searches run slower.
It will, but searching will not be as fast without indexing.