CCleaner - FAQ
Optimization and Cleaning
Do I need to be an administrator to install CCleaner?
Yes. Normally it is not possible to install new applications unless you are an administrator.
Product News
May 24, 2012
CCleaner v3.19Farewell UAC warning dialog with new faster startup!
May 24, 2012
Defraggler v2.10Now with 30% faster defrag!
April 25, 2012
CCleaner v3.18Added Firefox 12 and Chrome 20 support!