There are many good options for cleaning and maintaining a Windows computer. Some popular choices include CCleaner, Glary Utilities, and Advanced SystemCare. It is important to choose a reputable product that is compatible with your version of Windows and meets your needs. You may also want to consider using built-in tools such as Disk Cleanup and Disk Defragmenter to help keep your system running smoothly. It is always a good idea to create a backup of your important files before using any cleaning software, just in case.