Ccleaner doesnt open and is unnable to uninstall

[Haste]

I have a problem with ccleaner where if i try to open it it just doesnt do anything and if i try to reinstall it it sends me a NSIS ERROR message .Can someone please help me with this its been going on for weeks and im using windows

[nukecad]

An NSIS error is usually an inication that the installer itself has not downloaded correctly and/or is corrupted.
Where are you downloading it from?

Try downloading the Slim installer from here and use that to install:
https://www.piriform.com/ccleaner/builds

If that still doesn't work then come back and there are other things we can look at.
It will help if you tell us your Windows version, what browser you are using when downloading CCleaner, and what Anti Virus you are using.
(AVs are often at the root of install problems).