Hakurei Reimu as she appeared in the first five Touhou PC-98 games. "Classic" Reimu has long purple hair, purple eyes, and a more traditional miko outfit, with a white top and no yellow ascot. She may also look a bit younger.
The kanji in her name is a bit different from the Windows version (靈 <-> 霊). Despite this, she is not generally considered to be a separate character from the "Windows era" Reimu.