System Ninja is optimization software, it's snake oil as far as I'm concerned, and the staff here feel the same way.
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.
I you want to remove junk, do the following.
When AdwCleaner opens you will see an image like the one below.
Click on Scan to start the scan.
Once the search is complete a list of the pending items will be displayed. If you see any which you do not want removed, remove the check mark next to it.
Click on Clean to remove the selected items. If you have any questions about any items in the list please copy and paste the list in your topic so we can review it.
You will receive a message telling you that all programs will be closed so that the infections can be removed. Click on OK.
When the cleaning process is complete a log of what was removed will be presented. Please copy and the paste this log in your topic.
Open your browser and go to Downloads, then click on the Junkware Removal Tool to install it.
Click on Run to initiate the installation.
To avoid potential conflicts, temporarily disable your antivirus and firewall. You will want to be offline when you do this.
Run the tool by double-clicking it. If you are using Windows Vista, 7, or 8; instead of double-clicking, right-mouse click JRT.exe and select Run as Administrator.
The tool will open and start scanning your system.
Please be patient as this can take a while to complete depending on your system's specifications.
On completion, a log (JRT.txt) is saved to your desktop and will automatically open. Copy and this and then post this in your topic.