Mute button doesnt work

Assuming you ave reinstalled Windows correctly follow these instructions.

Using a microphone with computer

To use any microphone with your computer you will need to enable it in control panel. The following instructions are for Windows XP but are broadly similar for Vista and Win7

Click START, CONTROL PANEL, SOUNDS & AUDIO DEVICES

Click VOICE

In Sounds & Audio Devices Properties window locate SOUND PLAYBACK box. Click the VOLUME button. Make sure that there is not a check-mark in the MUTE box against microphone in the list of devices and that the volume slider is at the top of the scale.

Make sure the MUTE ALL box isn't checked before closing the window.

Now click the VOLUME button in the SOUND RECORDING BOX. Here SELECT microphone as an input source for recording (as opposed to un-checking mute in the playback controls).

NOTE if your microphone is not listed in the 2 sets of volume controls click OPTIONS, PROPERTIES on the tool-bar and place a check against microphone in the list entitled 'show the following volume controls' and then click OK. Same applies for Internal mic.

That should be it.

To adjust audio volume generally.

Under VOLUME tab adjust Device Volume as necessary. Also (under Loudpeaker Settings) click Speaker Volume and adjust slider to suit.

You might put a check mark in the box to show the volume control on the Task Bar so you can go straight to it to make adjustments in the future.

See last paragraph of instructions below re unlisted devices.

Using a microphone with computer

To use any microphone with your computer you will need to enable it in control panel. The following instructions are for Windows XP but are broadly similar for Vista and Win7

Click START, CONTROL PANEL, SOUNDS & AUDIO DEVICES

Click VOICE

In Sounds & Audio Devices Properties window locate SOUND PLAYBACK box. Click the VOLUME button. Make sure that there is not a check-mark in the MUTE box against microphone in the list of devices and that the volume slider is at the top of the scale.

Make sure the MUTE ALL box isn't checked before closing the window.

Now click the VOLUME button in the SOUND RECORDING BOX. Here SELECT microphone as an input source for recording (as opposed to un-checking mute in the playback controls).

NOTE if your microphone is not listed in the 2 sets of volume controls click OPTIONS, PROPERTIES on the tool-bar and place a check against microphone in the list entitled 'show the following volume controls' and then click OK. Same applies for Internal mic.

That should be it.

To adjust audio volume generally.

Under VOLUME tab adjust Device Volume as necessary. Also (under Loudpeaker Settings) click Speaker Volume and adjust slider to suit.

You might put a check mark in the box to show the volume control on the Task Bar so you can go straight to it to make adjustments in the future.

There is no technical reason why the Sennheiser shouldn't work with a computer.
Here are some general instructions re using mics with a computer

Using a microphone with computer

To use any microphone with your computer you will need to enable it in control panel. The following instructions are for Windows XP but are broadly similar for Vista and Win7

Click START, CONTROL PANEL, SOUNDS & AUDIO DEVICES

Click VOICE

In Sounds & Audio Devices Properties window locate SOUND PLAYBACK box. Click the VOLUME button. Make sure that there is not a check-mark in the MUTE box against microphone in the list of devices and that the volume slider is at the top of the scale.

Make sure the MUTE ALL box isn't checked before closing the window.

Now click the VOLUME button in the SOUND RECORDING BOX. Here SELECT microphone as an input source for recording (as opposed to un-checking mute in the playback controls).

NOTE if your microphone is not listed in the 2 sets of volume controls click OPTIONS, PROPERTIES on the tool-bar and place a check against microphone in the list entitled 'show the following volume controls' and then click OK.

That should be it.

To adjust audio volume generally.

Under VOLUME tab adjust Device Volume as necessary. Also (under Loudpeaker Settings) click Speaker Volume and adjust slider to suit.

You might put a check mark in the box to show the volume control on the Task Bar so you can go straight to it to make adjustments in the future.

If you still don't get enough volume then you may need a pre-amplifier to boost the signal

Using a microphone with computer

To use any microphone with your computer you will need to enable it in control panel. The following instructions are for Windows XP but are broadly similar for Vista and Win7

Click START, CONTROL PANEL, SOUNDS & AUDIO DEVICES

Click VOICE

In Sounds & Audio Devices Properties window locate SOUND PLAYBACK box. Click the VOLUME button. Make sure that there is not a check-mark in the MUTE box against microphone in the list of devices and that the volume slider is at the top of the scale.

Make sure the MUTE ALL box isn't checked before closing the window.

Now click the VOLUME button in the SOUND RECORDING BOX. Here SELECT microphone as an input source for recording (as opposed to un-checking mute in the playback controls).

NOTE if your microphone is not listed in the 2 sets of volume controls click OPTIONS, PROPERTIES on the tool-bar and place a check against microphone in the list entitled 'show the following volume controls' and then click OK.

That should be it.

To adjust audio volume generally.

Under VOLUME tab adjust Device Volume as necessary. Also (under Loudpeaker Settings) click Speaker Volume and adjust slider to suit.

You might put a check mark in the box to show the volume control on the Task Bar so you can go straight to it to make adjustments in the future.

Using a microphone with computer

To use any microphone with your computer you will need to enable it in control panel. The following instructions are for Windows XP but are broadly similar for Vista and Win7

Click START, CONTROL PANEL, SOUNDS & AUDIO DEVICES

Click VOICE

In the Sounds & Audio Devices Properties window locate the SOUND PLAYBACK box and click the VOLUME button. Make sure that there is not a tick (check-mark) in the MUTE box against microphone in the list of devices and that the volume slider is at the top of the scale.

Also make sure that the MUTE ALL box isn't checked before closing the window.

Now click the VOLUME button in the SOUND RECORDING BOX. Here you need to SELECT microphone as an input source for recording (as opposed to un-checking mute in the playback controls).

NOTE if microphone is not listed in the 2 sets of volume controls click OPTIONS, PROPERTIES on the tool-bar and place a check against microphone in the list entitled 'show the following volume controls' and then click OK.

That should be it.

However - if you cannot get enough volume on the microphone you may need to purchase a pre-amplifier to boost the signal strength before input to the computer.

go to your master volume and un mute the mic, if you cant see the mic settings go to the top laft where it says options click it then click properties go to where it says( show the following volume controls ) then click the box that says mic volume, then click the un mute on the master vol..

Some of these remotes are also made to run other components,so be sure to press the "tv" button and try the vol and channel again!

Have you tried the volume control on the right hand stick? They go into a mute mode if they are not used and you need to hit the volume button to un-mute them.

The physical volume keys on many laptops are either represented in the function keys (e.g. F1, F2, etc.) or sometimes in the arrow keys (on some Acers).
To use the keys, you need to press the blue [Fn] key (that is usually by the CTRL key) and then press the volume key on the function/arrow key to increase or decrease volume. There should also be a mute key that can be used similarly.

I'm not certain about yours, but my Acer Aspire 5920 has an audio/volume turn button, just under the lip of the laptop, just to the right of center. Even if you un-mute it, if the volume is turned down all the way - the button revolves, so looking a the front, turning it counter-clockwise will turn the volume down to off, and you won't hear a thing, no matter how much you try to un-mute the thing.
So turn that rotating button to the right, to make it louder, after you have un-muted a control panel volume slider and moved it up, and that just might make it work for you.
Good luck!