What is the registry and why is it there?
The registry is a database that stores all Windows options and settings. It contains all the data for all hardware, operating system software, all other applications, and all user settings (user profiles, installed software, the type of documents the users create, etc). All that makes the registry the most vital and also the most vulnerable part of a Windows computer.
Programs access the registry thousands of times per second and new entries are created whenever you install new software or hardware. All this makes the registry a very complicated database. That’s why it’s so important to keep the registry clean and well looked after.
How do registry errors affect computer performance?
When you uninstall a program, its registry entries get deleted as well. That’s the case with most applications. However, some programs leave a lot of rubbish behind. This clutters the registry with obsolete entries that point to non-existent software. Such invalid entries accumulate over time. As a result, Windows needs a lot longer to access the registry and your computer takes longer to respond. Not to mention viruses that love to attack the registry and modify it to make your computer vulnerable and unstable.
That’s why it’s so important to keep the Windows registry junk-free and fix errors.