At First, you need to go to Start, then run.
1. Type in regedit in the box.
2. Then, go to
Now, find the string DefaultRcvWindow .
3. Now, edit the number to 64240 then restart your computer. There you go. High speed cable modem now with out dloading a program. Original value is 373360
Note: This tip is for Windows 9x Only. If you want to get regestry settings for Win Xp visit this Page.