Recently i have upgraded my window 7 Home premimum to Enterprise. installation complete successfuly but there is no sound in new os. However sound icon is showing in the task bar and neither it is disabled nor muted or sound level is also upto 100%. Can anyone help me. I have checkked for everything. Run the diagnostic, updates etc. but nothing worked. I can see the graph bar after playing the music in media player it's going up and down and i beleive it's doing but sound is not coming out.

Hi Sandip, Double check all cable connections between the sound card and speakers. Please make sure the speakers are correctly connected and the power is on. Also, check if this issue occurs in another pair of speakers or headphone. If the issue exists when using other speakers, please perform the steps below to check the issue: Go to Start, type audio in the Start Search box and then click "Find and fix audio playback problems". Check if the culprit can be found. If the issue still exists, reinstall the sound card driver: 1. Click "Start", input "Device Manager" (without quotation marks) in the Search box, and then press "Enter". 2. Double-click "Sound, video and game controllers" to expand it. 3. Right-click the installed Sound Card and then click Uninstall. 4. Restart the computer. 5. Run Windows Update to download and install the sound card driver. Regards, Linda