System Ninja Home › Forums › Product Support › System Ninja This topic has 1 reply, 1 voice, and was last updated 1 year, 1 month ago by Shane Gowland. Viewing 2 posts - 1 through 2 (of 2 total) Author Posts October 31, 2023 at 12:34 am #26843 Paul WilliamsGuest System Ninja will not intsall on my windows 11 Pc, i have tried running it as Administrator, but when i click the .exe file the timer comes up for a split second then dissapears. Nothing else happens. Please help. November 1, 2023 at 8:36 pm #26938 Shane GowlandKeymaster Hi Paul, it sounds like an antivirus or firewall program may be interfering. What security software is running on your PC? Author Posts Viewing 2 posts - 1 through 2 (of 2 total) You must be logged in to reply to this topic. Log In Username: Password: Keep me signed in Log In