*Windows NT 5 ''(stopped supporting this OS after Season 8 Episode 5)''
*Windows NT 5 ''(stopped supporting this OS after Season 8 Episode 5)''
*Windows 2000
*Windows 2000
−
*Windows '''M'''illenium '''E'''dition ''(stopped supporting this OS after Season 8 Episode 5 but as of June 20th 2016, ME returned for URL based error requests only)''
+
*Windows '''M'''illenium '''E'''dition ''(stopped supporting this OS after Season 8 Episode 5, returned for URL based error requests only on June 20th 2016, and returned fully in 2019)''
−
*Windows Whistler ''(stopped supporting this OS sometime in Season 7)''
+
*Windows Whistler ''(stopped supporting this OS sometime in Season 7, returned in Season 11)''