
Virus Total results for the .exe file to install. Looks really bad:

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Mozilla/5.0 (Windows NT 6.0; WOW64; rv49.0) Gecko/20100101 Firefox/45.0
So the idea is this program is only getting flagged as PUA or PUP by all these A-V because it's often installed without the user's knowledge by other not very ethical programs, and that Windows cleaning program itself contains nothing nefarious?English
No, it's not a trojan but a false positive due to some antivirus engines flagging optimization/cleanup programs as potential unwanted ones because they're often side-installed by other freeware programs in non-obvious way, and user discover having a software they didn't ask for when they're nagged because the trial period is expired. This is obviously not NoScript's case, because it doesn't install anything.
viewtopic.php?p=82736#p82736
Bingo.kukla wrote:So the idea is this program is only getting flagged as PUA or PUP by all these A-V because it's often installed without the user's knowledge by other not very ethical programs, and that Windows cleaning program itself contains nothing nefarious?