Teemu Keisteri (born 22 August 1985) is a Finnish visual artist and DJ who is known for his stage persona Windows95man. As a visual artist, he gained recognition in Finland for creating the character Ukkeli (lit. 'Old man') in 2008. As a DJ, his artistic style and appearance draw inspiration from the late 1990s, during which the Windows 95 operating system was produced.
Keisteri participated as Windows95man with Henri Piispanen (Pasa, Kontio Polaris) in the 2024 edition of Uuden Musiikin Kilpailu, with the song "No Rules!". .
