I do not have a installation problem.

I downloaded the .zip, extracted and when its contents are in my downloads folder, my computer hangs and I need to off the computer by the off button (It might damage my computer)
It also happens when I go to the download folder!!
Font link: http://www.dafont.com/crewniverse.font
Please help and thanks!

No problem found here

Why no problem? I think I just downloaded a corrupted font.
I cant access my downloads folder anymore, thats sad :(

Everything here is safe, it is "human-tested" before it goes online So, I have tried to download the font you're talking about, put it in my Download folder, and everything is going ok Maybe you should try to download the font again, especially if you're on a WiFi connection.

As drf points out it's unlikely to be the font that's the problem.
Have a look at this 'google' search:
https://www.google.co.uk/webhp?hl=en#hl=en&q=windows+8+hangs+when+trying+to+open+download+folder
Hangs/crashes seem to be a bit of a common theme, so you may find your solution there …

The explorer is not the one which hanged, its my computer

I'de no problem to with this font.
The ZIP file includes TTF, OTF, PNG and TXT files. They are not format that can active a virus or trojan.

:( so sad i cant delete it

Take your PC to someone who still understands the command mode and the del(ete) command.