I have tried installing a few Arial fonts such as Arial Narrow bold on a Windows 7 machine, and can't get the font to be usable after I install it. The Arial font family, including Arial Narrow Bold, shows up in the Windows font folder, but I can't use all of the Arial fonts in Photoshop, Word, etc.
I have uninstalled and installed a few times now, with differing results each time. Sometimes certain Arial fonts are usable while others are not, and then after I re-install some other Arial fonts become usable while some that were once usable are now not.
I am wanting to use the whole Arial font family - including Arial Narrow, Narrow Bold, Narrow Italic, etc. But can't seem to get them all to be recognized by the programs I use.