I'd also focus on free maintenance programs like Advanced SystemCare, TuneUp Utitlites, free programs like these that offer system optimization, registry fixes, security, scans, internet protection, and etc...
Windows has the Disk Cleanup tool, this helps free up space on your hard drive and searches your drive and then shows you temporary files, Internet cache files, and unnecessary program files that you can safely delete. You can direct Disk Cleanup to delete some or all of those files. There is also the Disk Defragmenter which keeps the contiguous space organized which optimizes the read and write speed. Both of these do pretty much the same thing that SystemCare and Tuneup Utilities and are just as effective.
I definitely would suggest not installing registry a cleaning program. BleepingComputer does not endorse the use of registry cleaners, quite the opposite.
The following was originally posted by Animal, one or our Site Administrators.
Bleeping Computer DOES NOT recommend the use of registry cleaners/optimizers for several reasons:
• Registry cleaners are extremely powerful applications that can damage the registry by using aggressive cleaning routines and cause your computer to become unbootable.
• Not all registry cleaners are created equal. There are a number of them available but they do not all work entirely the same way. Each vendor uses different criteria as to what constitutes a "bad entry". One cleaner may find entries on your system that will not cause problems when removed, another may not find the same entries, and still another may want to remove entries required for a program to work.
• Not all registry cleaners create a backup of the registry before making changes. If the changes prevent the system from booting up, then there is no backup available to restore it in order to regain functionality. A backup of the registry is essential BEFORE making any changes to the registry.
• Improperly removing registry entries can hamper malware disinfection and make the removal process more difficult if your computer becomes infected. For example, removing malware related registry entries before the infection is properly identified can contribute to system instability and even make the malware undetectable to removal tools.
• The usefulness of cleaning the registry is highly overrated and can be dangerous. In most cases, using a cleaner to remove obsolete, invalid, and erroneous entries does not affect system performance but it can result in unpredictable results.
Unless you have a particular problem that requires a registry edit to correct it, I would suggest you leave the registry alone. Using registry cleaning tools unnecessarily or incorrectly could lead to disastrous effects on your operating system such as preventing it from ever starting again. For routine use, the benefits to your computer are negligible while the potential risks are great.
* Ed Bott's Webog: Why I don’t use registry cleaners
* Do I need a Registry Cleaner?