Originally Posted by isdex1
Would you please show me the step-by-step how you did this? I struggle with this for the last two days. I download the zip file from Acer, but it does not have the .inf file, it's only an exe file. Please help a newbie. I can't even find the modem folder in my 5570z, does it even come with a modem? Other than that, the laptop is working fine with xp pro sp2.
If you downloaded "Modem Driver 220.127.116.11.zip" and unpacked it, there should be AGRMDwxp.inf file. It is possible that you have settings for Explorer that hide system files (*.inf are considered "system" files).
Right-click on "My Computer" and choose "Manage". Navigate to "Device Manager." Look for devices in the tree with yellow triangle and exclamation mark. Double-click on such device (or right-click and select Properties). Click on Driver tab and "Update Driver" button there. Select "No, not this time" in the popup wizard if it asks to search for driver on Windows Update. Click Next. Select "Install from a list or specific location (Advanced)", click Next. Select "Don't search", Next. Click "Have Disk", "Browse", navigate to the directory where you unpacked modem driver. Select any INF file there (specific file does not matter, only directory). You'll return to the dialog with the list of matching devices that were found in INF files in that directory. Select the closest matching one (there shoud be only one in your case) and click Next.
There are variations on this but generally that's the way I do it in rare cases. Typically when I have non-WHQL driver without it's own installer - manual install with override is the only way then.