There are a number of Network drivers for the 755 on the driver page. Are you sure you have the correct one downloaded and installed? Also have you downloaded and installed the chipset drivers as well? As far as installing XP goes, I'll leave it at that.
Hi, I've recently reinstalled Windows XP on my old Optiplex 755 since I got a new HDD, and before doing a fresh reinstall it used to be able to connect on the internet and on my local network. I've installed the network related drivers from this page: [URL] However it still doesn't seem to work. Also, there are no network adapters in the device manager and the network one is in "other devices" showing like it isn't working/hasn't been installed... The Ethernet port I'm using is the one from the motherboard itself (using a working ethernet cable)
Optiplex 755 network drivers won't work