If you have installed an application that you have obtained from an untrusted source, it is likely that the program brought some viruses or malicious script along with it, and they somehow managed to change the value of an entry in the Registry. A couple of reasons that may cause Windows Registry to get corrupt include: Usually, the inconsistencies caused to Windows due to faulty Windows Registry are and remain negligible until the issue is severe.

However, you are strongly advised to be extremely cautious while altering the Registry as amending it incorrectly may make Windows behave obnoxiously or permanently unstable. If you have a thorough understanding of how the Registry settings work, or under which hive and by which name the entry of a particular Windows app is present, its value can be modified to make the program function differently. One thing that is worth mentioning at this point is, the entries in Windows Registry are configurable. Windows Registry can be accessed from its MMC or Microsoft Management Console that can be launched by typing ‘REGEDIT’ in the Cortana search box. Not only this, every application or the device driver that you install on the OS has an entry in Windows Registry as well.

All the background services, the configurations, your personal settings, and everything else that you see when Windows starts up has its entry in the Registry.

Windows Registry plays a vital role in the smooth functioning of the operating system.

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