Drop-down auto-complete in Windows/Internet Explorer
Internet Explorer, Windows XP
Information

4 levels of autocomplete behaviour:

No autocomplete -- disable Internet Options > Content > Autocomplete > Web Addresses and Advanced > Use Inline Autocomplete

Inline mode -- disable Internet Options > Content > Autocomplete > Web Addresses, enable Advanced > Use Inline Autocomplete

Drop-down mode -- enable Internet Options > Content > Autocomplete > Web Addresses, disable Advanced > Use Inline Autocomplete

Drop-down and Inline mode together -- enable Internet Options > Content > Autocomplete > Web Addresses, enable Advanced > Use Inline Autocomplete