How to clean the Windows Registry from unnecessary data? (Microsoft Regclean.exe)

RegClean 是一款功能全面的注册表清理和优化工具，旨在提升电脑性能。 软件首次启动时会进行系统扫描，评估计算机状态，并显示错误数量和损坏程度。

下載 RegClean Pro Windows 7 (32/64 bit) 免費。 用於使用註冊表的輔助實用程序，可以在自動模式下掃描記錄的狀態。

RegClean Pro这款注册表修复工具可以帮助用户轻松而有效的清理、修复Windows系统注册表中缺省的、被破坏的或残缺的系统参数，轻松提升系统性能。

RegClean analyzes Windows Registry keys that are stored in HKEY_CLASSES_ROOT in the Windows Registry. It finds keys that contain erroneous values, and after recording those entries in an Undo.reg file, it removes them from the Windows Registry.

RegClean Pro cleans, repairs and optimizes Windows registry. It fixes invalid registry entries from old files and programs that no longer exist improving PC performance.