Download Speed & Default director

Start registry editor (go to run and type Regedit)
Find the following key
Hkey_Current_User \ Software \ Microsoft \ Internet Explorer Modify / Create String
In data type (Reg_Sz) name the directory where you want to save the downloaded files
In value data type the complete path of directory you want to use as a default folder for downloaded files) exit from registry and reboot your computer.

Downloading Speed
To increase the downloading speed from internet through registry settings, first of all go to Start and from Run start registry editor
Run – Regedit press enter and go to the following registry key
Hkey_Current_User \ Software \ Microsoft \ Windows \ Curre Ntversion \ Internet Settings Modify / Create dword value data type reg _ dword named (maxconnectionsper1_0server) value data (0000000a)
Modify / create dword Value data type Reg _ Dword name (Max Connections Per Server) value data (0000000a) exit from registry and restart your computer.