Internet Explorer allows you to download up to 6 items(number of internet connection) at a given moment, that's the limit, but note that this limit can be set to 10 (max).
- Click on Start>Run>type "regedit".
- Expand the following entry :
HKEY_CURRENT_USER>Software> Microsoft>Windows>CurrentVersion>Internet Settings
- Create these two DWORD Value with value 10:
Close registry editor and restart your PC