to clean windows registry

Is there any trick to clean windows registry where s/w entries done after installation.
Because i want to reinstall s/w in case of its Demo version?
I mean to reinstall that Demo version s/w again.

Truth 1) Need to clean Windows registry.

Truth 2) Need to Reinstall the Demo software again, Which you had Uninstalled.

Real Truth : Why you want to clean windows registry. Keep it as it is, Just Reinstalled the software again

:roll: Z is missing :shock:

I use CCleaner, it does registry cleaning and a couple of other useful things too. www.piriform.com/ccleaner

Like Solo said try out CC cleaner. On a side note I see a vast improvement on your sentence syntax.

thanxoo 2 U all
(special thanks To Nevins for improving my ENG side by side)

i did use ccleaner but when i reinstalled the demo verzion s/w , the enterY had been not erazed...
the event iz such that i installed s/w having 30 days free using ,
after 30 dayz ... its runing stoped . and i wanted to reinstall but might be its entry in registry and so not worked...
therefore if there any way to clean registry and that demo version s/w would work again ...???