When I run lpksetup.exe /u it only comes back with one language, which is OK; however, scattered throughout the Vista file system there are dozens of other languages. For example, searching the drive for *ja-JP* locates 125 files+folders. And, as I said, this is but one of dozens of them. With dozens of languages, each creating 125 files+folders, that is a significant disk space footprint.

Are these really necessary? Is this standard Windows Vista Home Premium, or it debris resulting from having bought an HP?

If lpksetup.exe does not recognize them as MUI, how can I clear them out?

That is just one example, they are also in a lot of other places, too. All with date stamps before I got the PC, so they obviously came on the HP build. In addition to en-US, this it what is strewn throughout the file system:

ar-SA
bg-BG
cs-CZ
da-DK
de-DE
el-GR
en-gb
es-ES
et-EE
fi-FI
fr-FR
he-IL
hr-HR
hu-HU
it-IT
ja-JP
ko-KR
lt-LT
lv-LV
nb-NO
nl-NL
pl-PL
pt-BR
pt-PT
ro-RO
ru-RU
sk-SK
sl-SI
sr-Latn-CS
sv-SE
th-TH
tr-TR
uk-UA
zh-CN
zh-HK
zh-TW

Still, how do I get rid of them and recover the space? They're too entrenched in the OS to simply delete without damaging the OS, and I'm not yet prepared to do a clean install (which, of course, is the correct
solution). Any ideas?