Windows 10 has several hidden features and settings that reside within the operating system, but can’t be accessed through any normal means And because they’re hidden out of sight, the only way to access them is by means of the Windows registry editor.

Note : Before you edit any part of your system registry, always make a backup of all keys that you intend to edit. You can do this in the Registry editor windows click on file selecting Export, which saves into a .reg file that can be run to re-apply the old value of that key.

Disable Login Screen Background Image
Microsoft has put the new /”Hero/” wallpaper as the background image of Login Screen in Windows 10.
We can Disable or remove by Editiing fallowing Registry
Nevigate to HKEY_LOCAL_MACHINE//SOFTWARE//Policies//Microsoft//Windows//System
In right-side pane

Increase Taskbar Transparency level
By default, the Windows 10 Taskbar comes with an Aero glass transparency effect but the transparency level is not very high.
you can increase the transparency level of the Windows 10 Taskbar and can add extra clear transparency effect to the Taskbar By Editing some Registry Tweak

Restore the Previous Volume control
Microsoft has added a new horizontal UI for volume control slider in Windows 10 which is shown when you click on the Sound icon in the Taskbar notification area. If you don’t like the new UI, you can restore the previous vertical volume control slider using following method:

Disable the New Tray Clock and Calendar UI and Restore the Previous UI
Windows 10 comes with a new calendar and clock if you want to restore your clock and calendar to windows 7 clcok calendar fallow

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