Please follow:
1) Go to Start Menu.
2) Go to Run.
3) Type regedit. The Registry Editor window will appear.
4) Expand HKEY_CURRENT_USER.
5) Expand Software.
6) Expand Microsoft.
7) Expand Windows.
9) Click Internet Settings.
10) In the right panel double-click MaxConnectionsPer1_0Server. A new window will appear.
11) Click Decimal. In the Value data box put 10000. Click Ok.
12) Now, just below, double-click MaxConnectionsPerServer. A new window will appear.
13) Repeat Step 11.
14) Close Registry Editor.
15) Start browsing with your improved IE speed.

