CCleaner "Insert Disk" error

]Hi, I am new to this forum so I apologize if this is a repeat question.

I downloaded the free version of CCleaner and used it without problems on my old computer. Recently I got a brand new computer

and I wanted CCleaner to absolutely be on it. So I downloaded it, it worked fine for about a week...then I got a message telling

me that I needed to "Insert A Disc"...So I uninstalled it, downloaded it again, reinstalled it and still got the same message.

How can I fix this problem?? What causes this to happen?? I am running Windows 7 if that might help someone answer this. Any

feedback would be helpful. Thank you!!

See here

http://forum.piriform.com/index.php?showtopic=33023