Hi, im new to this forum, currently i have a ds-2cd2532 that is wr that was also hacked, the hacker reset the camera to the original ip and password, i got that one updated to 5.4.5 build 170123 and its working. But i also have a ds2cd2335-i cam that was also hacked, the hacker changed a few settings and osd to hacked. I reset the password, disabled upnp on both cameras, i also went into ip address filter on both cameras and added the ip of my computer and nvr, and went into my router and blocked http and https ports for these cameras. This camera is a ch camera with firmware 5.4.20 build 160726, I'm having a hard time trying to find the correct firmware, I think it may be this one IPC_G0_CN_STD_5.4.41_170710 that i got from the chinese hikvision website. does anybody know if this is the correct file to use? And is there good information on how to update this camera safely so I don't brick it? thanks.