So, given the results of the command you executed:
a) Your copy was not
downloaded from mirc.com (or you modified it from the original, which you were not told to do). You're using a hacked/cracked/patched copy of mIRC, which violates the EULA, not to mention is a probable cause for any issues you might have.
b) Your copy of mIRC is not
a clean install. You have 47
scripts loaded and 3 dll files. That is certainly problematic, especially since you claim you have a fresh install. Either you can't follow directions (to absolutely test this on a clean install) or you're unaware what you're using.
47 script files is a lot, especially when you're using a buggy script. We won't debug those files for you. If you don't use an actual
clean vanilla install of mIRC from http://www.mirc.com
to reproduce this issue there's not much we can do for you, since there's no way to isolate mIRC as the cause.
I therefore maintain my original statement: "you're using a script. Get rid of your buggy script and mIRC will likely stop freezing."