DetectOS in CCleaner Bug Reporting Posted April 27 I had a little more time to check the bug and have to correct parts of my previous post. (I use Windows 10 for my following examples.) The following DetectOS strings no longer work: DetectOS=|10.0 (= for Windows 10 and older) DetectOS=10.0|10.0 (= only for Windows 10) The problem seems to be that the version number after the pipe symbol now also needs the build number, because the following strings work: DetectOS=|10.0.18363.778 DetectOS=10.0|10.0.18363.778 Please make sure that CCleaner, if no build number is included in the string, behaves like the previous versions and accepts a simple "|10.0" again. Thanks! @hazelnut: Thanks for the flagging.