Even if you upgrade your computer as often as possibly, you’ll start to notice that soon your new PC is starting to act just like your old one slower than a turtle the Windows operating system uses certain system files to be able to do the job. One is called the registry they keep on being created.once this corruption passes a certain point your PC will most-likely become slow. Your PC may crash or you might see the BSOD (blue screen of death) more often. If you have already downloaded and run a free registry cleaner such as: Eusing Free Registry Cleaner, FreeWindows Registry Repair, Glary Utilities, Ccleaner (all should be used,) you probably will discovered hundreds of registryerrors that were hiding on your hard drive. Do a scan and fix the errors and you will besafe again.If you want a very good registry cleaner that will also fix other computer errors,get PC DOC PRO or one that is also very good but not as good:Registry Booster, Glary Utilities pro.If you are not very good maybe you should not use a registry cleaner, because it maycause some problems with the Pc. So you should always backup the registry files.No matter what, if you are bad with a PC or good with a PC I do recommend you useCcleaner. It is a weak registry cleaner, that won’t cause any problems but will helpfix any manger errors.