@hskoglund said in Crushes after deploying!: Hi, googling finds many with the same problem, for example here Just guessing, but perhaps you could try some of the suggestions in there... Thanks for the link. It seems this issue doesn't even solved in Stack Overflow :( Any way, I did some of the suggestions mentioned in it. Installed all redistributable package of x86 (cuz I built my app using Qt mingw53_32) for 2012 - 2013 - 2015 - 2017 (I tested my app after each vcredist) Installed all redistributable package of x64 for 2012 - 2013 - 2015 - 2017 (I tested my app after each vcredist) Nothing changed still see my app crashes without any logical reason! Now I'm very sad because I can run my app only if I installed Qt on my machine which is impractical solution for deploying my app.