The registry is where some of the most important files on a computer are stored. The registry contains data from software, computer configurations, and important files that enable an operating system to work efficiently. Overtime, however, the registry may become overloaded with excessive applications and files. An excess of applications and files often decrease computer performance. An effective way to solve this problem is by cleaning the registry. Albeit registry cleaning programs are often used to clean the registry, it is possible to clean the registry manually.
Detect registry problems in your computer. It is important to detect registry errors, because it helps you identify the main source of the problem. Look for the common signs of registry errors---which are: decrease in computer performance, frequent computer crashes, and frequent .exe and .DLL errors. You can also use a registry scanner to look for registry errors.
Open the Registry Editor. The Registry Editor allows you to modify and remove registry settings. To open the Registry Editor on Windows XP, go to the Start Menu, and click on "run"---which is located at the right side of the Start Menu. To Open the Registry Editor on Windows Vista or Seven, access the Start Menu, and type "regedit" on the search bar.
Edit and modify registry settings. After Opening the Registry Editor, go to "HKEY_CURRENT_USER" and select "Software". You will then see a list of the registry settings for all of the software on your computer. Remove registry settings of programs that already uninstalled from your computer. Old traces and settings of a program are usually left behind, after it has been removed. To delete a registry file, simply right-click on it, and click on "delete".
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