How To 

How to Remove a Record from Windows 10 Registry

Removing a record from Windows 10 registry is as simple as right-clicking an unwanted Key or DWORD Value, clicking Delete, and clicking Yes to confirm your action.
However, what more important and extremely dangerous is to locate the correct record and delete when found respectively. If you delete any important entry from the registry either erroneously or out of ignorance, you PC may start behaving obnoxiously, become unstable, or Windows may get permanently damaged altogether.
Since Windows Registry is an enormous hive and removing a record from it is a pretty simple process, this tutorial primarily focuses on locating and removing a record of an installed app so that it no longer appears in the Apps & features list in the Settings > Apps window.
Here’s how you can locate and remove a record from Windows 10 registry:
WARNING: Modifying Windows registry incorrectly may cause Windows to become permanently unstable and/or unusable. If you’re unsure or don’t have enough technical knowledge about how Windows and Windows registry work, you are strongly suggested NOT to mess with the registry settings.
DISCLAIMER: Neither Tom’s Hardware, nor any of its direct or indirect associates, author of this tutorial, or any other direct or indirect personnel associated, or by any means related to this tutorial or forum should be held responsible for any damage caused to your computer due to incorrect modifications in the registry. If you wish to follow the procedure given in this tutorial, do so at your own risk.
RECOMMENDATION: Make sure to back up Windows registry before proceeding any further by opening the Registry Editor window, going to File > Export, selecting your preferred backup location, giving the backup file a name, and clicking Save.
    Open Registry Editor
    Type REGEDIT in the Cortana search box, click REGEDIT from the Best match list (or press Enter), and click Yes in the User Account Control confirmation box. This opens the Registry Editor window. From here you can manage Windows’ registry, and with some smart tweaks, customize your Windows 10 to utilize its features at their full.
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    Get to the Uninstall key
    Type HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall in the address bar at the top of the Registry Editor window, and press Enter. This expands the Uninstall key. This hive contains all the installed apps, i.e. both the legacy programs and those from Microsoft Store. The apps are present either by their respective names or IDs, and are listed in the form of keys.
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    Remove a record

Right-click the key for the record you want to remove (Mozilla Firefox for this demonstration), click Delete, and click Yes in the Confirm Key Deletion box. This removes the record from Windows 10 registry. Since the records are present by their respective app IDs as well, if you can’t find the app’s name listed under the Uninstall key, you may need to select each record (key) from the left pane, and check its corresponding DisplayName string from the right window to locate the one you’re looking for.
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Note: As mentioned earlier, make sure not to remove any important record to avoid any damage to your computer.