windows registry file types

What is the correct / fix command on XP to fix registry problems automatically?
I can not remember, but it is a small built-in Windows when you write to execute "what I forgot" / fix that is running a test see if all the registry files are installed correctly / are not lacking. Thank you thank you for your help in using this day, but not chkdsk, I have seen that it used a few times, but it started as -> Run-> then "forgot" / fix. I think it checks. Dll / register in the Windows installation. You need the Windows CD in the drive but in general everything goes in the Windows GUI
There is a feature built into XP
It is known to all that we can optimize Windows 7 in several ways. But yourself a lot of disk space on drive C: it has not even thought any program installed on this subject? It is really unnecessary files from the hard drive, making this problem. Here, you'll get solutions how to optimize Windows 7 by cleaning up unwanted files system.
Normally, Windows 7 system junk files are stored in two main areas: one is in the folder, and the other is in the Windows registry. So when it tries to maximize the window cleaner in 7 files unwanted system, please remember this.
Junk files stored in the following folders: (suppose that C is the system drive) 1) unwanted files in "My Documents" C: WindowsRecent 2) Temporary files is time to install new programs or editing files: C: windowstemp 3) The files that were deleted from the Recycle bin: C: 4 recycling) Files temporary while browsing on the Internet: C: WINDOWSHistory and C: WindowsTemporary Internet Files 5) witnesses browsing Web sites: C: \ Windows \ Cookies
Junk Files in the Windows registry include: When you use the computer, the file is read and write often, this type of information will waste, such as missing shared DLLs, extensions of unused files, type libraries, fonts, paths of application files assistance, software obsolete. All these will come out of nothing / invalid entries in Windows registry, swelling and cause system slowdowns, Then UPS freezing, and accidents.
So, to optimize Windows 7 is necessary for you to regularly clean useless junk files from your computer system. Usually, it is easy to do using the built-in Disk Cleanup utility: Go to Start, All Programs, Accessories and Tools system. Here, you can simply run the Disk Cleanup and select the types of files to delete. This way, many junk files and system of temporary files, downloadable files will be deleted.
But when you take on a clean Windows registry, we recommend analyze the computer in a recording professional cleaner instead of deleting manually, for once, there is a problem with the Windows registry, computer incorrectly run. Today, with the development of Internet technology, it is easy for you to access certain Registry Cleaner free on the site, but please remember to first back up the Windows registry before every scan.