For those of you who use CCleaner to keep your systems tidy may or may not know that Avast acquired them several months ago, promises were made that they wouldn't mess with the product and leave it in the hands of the previous developers.
Much of those promises have held, though now that Avast has corporate greedy shareholders wanting their piece of the pie it was only time before CCleaner became adware/spyware, as of the latest update 5.44 offers are continually displayed every time the program is opened and the program is reporting home much more information than previously.
If you're using third party firewalls then it's quite simple to block the outgoing data transmission which will in turn block the advertising, the other option is to shove it up Avast's clacker and install another program with a similar feel and options layout that retains an equally safe reputation.
Complaints on the Avast forums are building and on Widers Security forums and many including myself are moving to the free version of Privacy Eraser which in my use of over the last week has been very reliable.
Do yourself a favour and stick it too the man
Privacy Eraser: 1-click browsing history deletion, PC optimization & moreThe Avast/AVG antivirus programs are going this same route now days as well so you might see me here more once I get the boot from Avast