If you cannot read Japanese, why are you running a Japanese-language version
of Windows?
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Consider the following scenario:

You've installed an English-language version of IE7 on a non-English
language version of WinXP.

You (or Automatic Updates) checks for available Windows Updates; One of them
is an update for IE.

As part of the update process, the Windows Update server analyzes your
machine to logically determine, among other things, the language version of
Windows.  In your case, the server identifies a Japanese-language version of
Windows, so all updates offered to the machine are Japanese-language
versions; this includes any update(s) for IE (yes, even though it's an
English-language version).

Installing the Japanese-language version of an update for IE7 (e.g., 933566)
has the affect of changing your IE7 version from English to Japanese; in
essence, installing the update installs a new and updated version of IE7.

Keep in mind that IE is not a standalone browser and is as much a part of
the Windows OS as is Windows Explorer (e.g., click on a link in Favorites
dropdown menu in a Windows Explorer window and see what happen), so it's
very important *for the security of your machine* that your IE language
version matches your Windows language version.

[I suppose you could download and manually install the English-language
version of the IE update to keep IE7 in English, but then the security of
your system might well be at risk...and Automatic Updates might not be too
happy about it.]

Whatever you do, I strongly recommend that you not disable Automatic Updates
in order to avoid ending up with a non-English language version of IE7.