Need HELP!!!

[JayCub]

Thank you INDRANIL another source for me to look too,

[LizardMan]

Thanks guys, I managed this work and everything works fine. All PC-s are configured property in the network.
The only problem is that 2 of PC-s don't have audio. I checked device manager and all drivers are installed, the audio too. But system tray icon has a red X. Also did windows update and didn't find anything. Audio cards of both PC-s are integrated and I'm surprised that Win 7 has this problem.
Do you have any idea what can cause this problem and what can I do to resolve ?

[Alboguy]

Uninstall and re-install the audio driver. But make sure to deactivate deepfreeze 1st.

[INDRANIL]

Open devmgmt.msc in xp mechine (if any of them is xp) click on scan for hardware changes and install the missing driver, for latest win 7 audio driver look here. Do what Alboguy suggested above deactivate first.