A Windows registry checker will scan through all the files and folders of a Windows operating system’s registry and mark all the files that are incomplete, inaccurate as well as all those now missing but should be present. Doing this is usually a prelude to the second phasee a registry cleaner will perform. That phase is the part of the operation where the software program reinstates the missing files, restores the incomplete ones to their complete state and repairs the inaccurate entries. In other words, a Windows registry checker is the first step performed as part of a registry cleaner’s one-two punch.
Registry cleaners are needed because these inaccurate, incomplete and missing files are a constant threat to a Windows registry. The effect they have on a computer whose registry they are infecting is to slow it down and worse! These bad and missing files are also known as registry corruption. Registry corruption has the potential to destroy a computers performance. Because it makes the operating system work to sort out the corruption from the good entries, it is in effect making the computer do twice as much work.
Also, as the computer is sorting through registry corruption, it actually performs some errant instructions. 
Performing these things that have no purpose, as you might expect is a waste of time and so this further acts to cause a computer to run slowly. Beside that fact is the fact this will sometimes cause the computer to commit errors. The user will see this as error pop up messages in a wide variety of different numbers including but limited to the r6025 error.
Still, overcoming these errors and computer slowing down troubles is not insurmountable. Running a Windows registry cleaner, which is actually a Windows registrty checker/cleaner, will repair these damaged files and restore the missing ones. This in-turn will revert the registry to its original clean condition. This will stop the computer from committing errors and return it to its original fast self. It is too bad we have to take the extra step of employing the services of a registry cleaner in order to keep our computes fast these days, but this is just a fact of life for we PC users.
photo credit: valentin.d
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