@Andre Ribera, you are right. Most of the time it happens at installation and while launching the applications. I reinstalled but didn't succeed to fix the issue. But, thankfully, a friend of mine suggested me to download the missing DLL file from here: dlldownloads.com/zlib1-dll/ and replaced the older file from the directory with this new file, and rebooted the PC. It actually worked for me. Thanks to all of you once again.