I accidentally deleted my Realtek Sound Manager and the Audio Device with it. When I re-downloaded and re-installed the AC97 driver.

My Device Manager says that it is installed properly, but no sound is coming.

I also noticed in the Sounds and Contols in the Control panel that the only device stated to be installed is "Modem#0 Line Playback."

I had XP Service Pack 2 and runs in Intel Pentium 4.

Help could be appreciated.

What is the brand and model of the computer, or the motherboard, or the soundcard.

There is more to RealTex AC'97 than just the driver on many models.

You might get by with Media Player 11, or WinAmp, or ITunes, or Quicktime, or RealPlayer, or ITunes, or others, and you perhaps need one of them to complete this install to make everthing work.

My soundcard is this:

Name Unimodem Half-Duplex Audio Device
Manufacturer Microsoft
Status OK
PNP Device ID MODEMWAVE\0\{42177B57-5718-4E89-9334-81A94D66CC79}
Driver c:\windows\system32\drivers\modemcsa.sys (5.1.2600.0 (xpclient.010817-1148), 15.75 KB (16,128 bytes), 7/28/2007 6:16 PM)

My audio codecs are these:

c:\windows\system32\iac25_32.ax Intel Corporation Indeo® audio software OK C:\WINDOWS\system32\IAC25_32.AX 2.05.53 195.00 KB (199,680 bytes) 7/28/2007 5:54 PM
c:\windows\system32\imaadp32.acm Microsoft Corporation imaadp32.acm OK C:\WINDOWS\system32\IMAADP32.ACM 5.1.2600.2180 (xpsp_sp2_rtm.040803-2158) 16.00 KB (16,384 bytes) 7/28/2007 5:51 PM
c:\windows\system32\l3codeca.acm Fraunhofer Institut Integrierte Schaltungen IIS Fraunhofer IIS MPEG Layer-3 Codec OK C:\WINDOWS\system32\L3CODECA.ACM 1, 9, 0, 0305 284.00 KB (290,816 bytes) 7/28/2007 5:55 PM
c:\windows\system32\lhacm.acm Microsoft Corporation Lernout And Hauspie Codecs OK C:\WINDOWS\system32\LHACM.ACM 4.4.3345 32.27 KB (33,040 bytes) 1/1/1980 12:00 AM
c:\windows\system32\msadp32.acm Microsoft Corporation msadp32.acm OK C:\WINDOWS\system32\MSADP32.ACM 5.1.2600.2180 (xpsp_sp2_rtm.040803-2158) 14.50 KB (14,848 bytes) 7/28/2007 5:51 PM
c:\windows\system32\msaud32.acm Microsoft Corporation Windows Media Audio Codec OK C:\WINDOWS\system32\MSAUD32.ACM 8.00.00.4487 288.00 KB (294,912 bytes) 7/28/2007 5:55 PM
c:\windows\system32\msg711.acm Microsoft Corporation msg711.acm OK C:\WINDOWS\system32\MSG711.ACM 5.1.2600.0 (xpclient.010817-1148) 9.00 KB (9,216 bytes) 7/28/2007 5:51 PM
c:\windows\system32\msg723.acm Microsoft Corporation msg723.acm OK C:\WINDOWS\system32\MSG723.ACM 4.4.3400 116.00 KB (118,784 bytes) 7/28/2007 6:04 PM
c:\windows\system32\msgsm32.acm Microsoft Corporation msgsm32.acm OK C:\WINDOWS\system32\MSGSM32.ACM 5.1.2600.0 (xpclient.010817-1148) 19.50 KB (19,968 bytes) 7/28/2007 5:51 PM
c:\windows\system32\sl_anet.acm Sipro Lab Telecom Inc. Sipro Lab Telecom Audio Codec OK C:\WINDOWS\system32\SL_ANET.ACM 3.02 84.00 KB (86,016 bytes) 7/28/2007 5:55 PM
c:\windows\system32\tssoft32.acm DSP GROUP, INC. tssoft32.acm OK C:\WINDOWS\system32\TSSOFT32.ACM 1.01 8.00 KB (8,192 bytes) 7/28/2007 5:53 PM

I tried RealPlayer, and I have already Quicktime, iTunes, MP 11 or so, but still no sound.

I checked the Control Panel and the sounds and they worked fine. Also the Device Manager. There is no X or ! mark so they seemed to work.

What could be the culprit?

Wait a second. The AC97 driver I installed has no driver. I cannot install the driver because the Microsoft UAA Driver needs the installation disk for HdAudio.sys. I don't have such disk and can't seem to find the driver. Can anyone figure it out?