We use geo-blocking controls to prohibit downloads in countries sanctioned by the US Government:
This is because we're a software developer that operates in the US, and we have to comply with US export controls and sanctions. If you live in a sanctioned country, we have to make sure you can't download or update our software in your location.
What happens if you try to download CCleaner in a sanctioned country?
You see a message that says we don't support CCleaner in your current location.
Does this impact me if I'm traveling in a sanctioned country?
Yes, it does. However, this changes once you get to a non-sanctioned country.