Internet Explorer by default allows only 2 simultaneous downloads from single URL.This is in line with the HTTP 1.1 standards that not more than 2 simultaneous connections be permitted at a time.
This can be changed by registry hack.Let’s take a look at how can we make IE download more than the default in Vista by changing it’s registry settings.
Open registry editor (Start > Run > regedt32.exe)
Drill down to :
HKEY_CURRENT_USERSoftwareMicrosoftWindowsCurrentVersionInternet Settings
Here,we need to create two DWORD values (of 32-bit).Right click on right side of registry editor pane and select New > DWORD (32-bit value).
Name them exactly as follows :
MaxConnectionsPerServer – This is for HTTP 1.1 compliant web servers.
MaxConnectionsPer1_0Server – This is for HTTP 1.0 compliant web servers.
As a thumb rule,doubling the default values of these DWORDS should be ideal.Do keep in mind that excess greed is bad and if you try to increase to a ridiculous large number,these connections may be blocked by web servers in order to prevent excess load on them.In all possibility,setting too high a number for these DWORDS will result in super slow connections due to the throttling by web servers.
Peace.