Taking a long time to install

I purchased the cd and it is still installing after an hour. Is this normal?

No.

Minutes at the most even with a very slow broadband.

Where did you purchase the CD from?

Directly from CCleaner. I ended up shutting the computer down and restarting it. Then it showed that everything has been installed.

Unsure but there was a Windows Cumulatuve Update this weekend which may have been installing?(Took half an hour on my laptop yesterday).

As long as it's working alright now then that's good.