Ist tweaknow.com sicher?

CAUTION--the registry cleaner and registry tweaks can be beneficial, but are not for beginners/novices or those who do not know how to Backup and Restore a Registry. I used this years ago, and was much more of a novice at that time, and I trusted that the registry cleaner did not make any mistakes, AND IT DID, and made it impossible for me to update Sun's JAVA and Adobe Flash , and messed up other settings, and I ended up having to reformat my hard drive. So, all registry cleaners should be used CAREFULLY, and before you "clean" anything, make sure what you want to remove is "non-existent".