Hi Aksh06,
Thank you for posting in the Microsoft Community. It seems that you have an issue with I ball 4.1 speakers not working on Windows 7. This can be really frustrating for you and I appreciate the efforts that you have put in. Let us work together as a team try to get this issue fixed.
Let us start with a few questions-
1) Do the speakers work on a different computer (running the same Operating System)?
2) Have you made any other changes on the computer?
I would like more information regarding the issue.
Method 1–
I would have you run the fixit-
Hardware devices are not working or are not detected in Windows
http://support.microsoft.com/mats/hardware_device_problems/en-us
Method 2-
Generally, only two speakers can be recognized at a time when you connect them to the CPU.
Two speakers have a common port. So whenever you connect all the speakers, through the woofer, then only two speakers are detected at a time.
I would have you connect all the speakers through the woofer and then purchase a splitter from a local tech shop and connect it to the port on the CPU.
Check if it works.
Do let us know if you need further assistance. We will be happy to help.
Thanks.