a- They should not be interfering in technical aspects of their computers
b- They do not know whether these registry fix software programs work or not
c- They do not understand why so much importance is given to the registry in the first place.
d- Why use registry fix software programs when computer experts are just a phone call away?

Would you call a car mechanic to replace a punctured tire? Would you call a mechanic just to close your microwave’s door? Would you call a locksmith to turn the key and lock a door? Using registry fix software programs to clean your registry and keep it working is no different than the activities mentioned above.

If you are contemplating making changes to the registry manually, then you ought to call the experts. No expert will be prepared to touch the registry and make changes manually. It is too big and too complex to be tampered with by even an expert.

That is the reason why most experts recommend such tools for registry maintenance is that they do not have to spend time reformatting the hard disk when a mere tweak of the registry would do. Reformatting involves loss of precious time and effort. The files are stuck in the inaccessible hard disk and there always is a risk of data loss.