Unicodedata.pyd file is a dangerous file that belongs to MacroVirus and a long list of other viruses. It is installed on computer system as soon as this virus enters it and it is launched every time the machine is rebooted. In most of the cases, this file is used for launching a parasite, updating it, displaying commercial advertisements and initiating other dangerous tasks that can easily degrade system's performance. That's why you should never keep unicodedata.pyd on it.
If you want to remove Unicodedata.pyd from your computer, you should launch RegCure Pro. It will check your entire PC system and will help you to remove all malicious files from it. Note that sometimes a presence of unicodedata.pyd can not necessarily indicate that your computer is infected. It can be an essential system file or a file installed by harmless and legitimate software. That's why you should check this file before eliminating it.