Searching the Compaq support site comes up with the items in the link below for your computer. You should see the Modem drivers listed there. I would probably install the most current driver in the modem list but that's up to you. It appears like the modem is a separate PCI modem, but you should verify that by looking in the case..Many of the older HP's had integrated modems which require one of the other drivers listed.:
Software & Driver Downloads Compaq Presario 5050 Desktop PC
Hope this helps.
Hi. I recently lost my cable modem, but managed to download Netscape dialup beforehand. For some reason it won't detect my modem now. I checked out the Compaq site to find the modem number in case I need a driver, and it doesn't show up on any of the lists. It says it's a 56k ITU V.90 modem. Nothing even close to that on the options.
OS: Windows 98
PC: Compaq Presario 5050
Other info: I had reformatted the computer since the last time I've used the dialup modem. I don't know why the computer can't find it though, or why it won't show up under Compaq in any list. Thanks in advance!