SOLVED: Acrobat Reader: "Cannot find or create [font_name]"

My girlfriend got a music score PDF file somewhere but the Acrobat Reader failed to read it probably, reporting error like "Cannot find or create [font_name] ! Some text may not be displayed correctly". Something like that.

Obviously that's a problem of missing font. Thanks to the powerful Google, I find a free download of that font and a potential solution.

Here is what I have done:

1. Download and install the font by copying the TTF file to %windir%\FONTS (normally that means C:\Windows\FONTS). If I am right, you can also access that folder through the Control Panel.
2. Close all Acrobat Reader windows, and then reopen the file.

It may already work magically. But in order to make sure it works, I also followed what suggested in the potential solution page by deleting the font list before 2. This force Acrobat Reader to rebuild the font list cache. To do so, browse to the folder C:\Documents and Settings\Local Settings\Application Data\Adobe\Acrobat\9.0\Cache on XP, or C:\Users\AppData\Local\Adobe\Acrobat\9.0\Cache on Vista. Note that the folder is hidden, but simply copy the path here, replace with your username and paste to the location bar of your Windows Explorer should work. The path may also be slightly different if you are using different version of Acrobat Reader. Finally you just delete the file named AcroFnt09.lst. To play safe you may also consider renaming the file instead of deleting it. You will see a new file of the same name created after relauching Acrobat Reader.

The major difference in my case to the potential solution page mentioned above is that I didn't restart the computer, and I wasn't prompted for installation when I reopen Acrobat Reader.

Hope this helps.