I've had the same problem with Windows 8 Pro.
It was a laptop installed with Korean / Chinese / Japanese language packs.
I reset everything to default US English and uninstalled Microsoft update KB2723161 (needed for PinYin).
The original administrator signed up with a Microsoft account. Now this account has been turned into a normal user account and a local Windows account has been set up as the administrator.
After having everything in English again, I cannot reinstall these language packs for any user, including the administrator. There are some suggestions on microsoft.com that if a language pack fails to install via the
control panel, there's always the option to get the manual download of the language pack and see if that works.
Now guess what, exactly the languages that I need are not available for manual download :(
The Windows troubleshooting is of little help. Every time it says it fixes Windows updates but no difference. Cleaning out c:\Windows\SoftwareDistribution manually has other bad effects, I've
looked around and seen many suggestions but only 1 seems to work all the time: a full reinstall.
We have other computers at the same location, same hardware, same software installed. The other computers have absolutely no problem with language packs so this all points to some kind of a corruption in the locally downloaded
files.
How difficult can it be to put an "apt-get clean" in Windows???
This computer is 11000km (~7000 miles) away from me so I would kindly want to request a decent solution that doesn't require a Factory Reset or re-install.
Exactly my problem: https://forums.lenovo.com/t5/Windows-8/Failure-Upon-Language-Pack-Installation-Windows-8-Pro/td-p/1088353
Although I'm dealing with Dell systems