I am trying to use "PC Suite for Sony Ericsson" or "My Phone Explorer" to synchronize the content (SMS, Contacts, etc) of my phone (K810) with PC. But none of those softwares recognize my phone when it is connected to PC through a USB cable. I thought maybe the required USB drivers for Sony Ericsson were missing, so I downloaded this, but when I run it, even the installer does not detect the connected phone and installing the drivers fails as well. What should I do?
If you still can't access your files via software try opening it in Windows Explorer (if it's recognized it'll be in My Computer).
Alternatively boot a different operating system live CD and try opening it from it. I've got an old MP3 I couldn't open on Windows (wasn't recognized) and could open it on Fedora (just open to get the files, there wasn't any software available, though). Or just try on a different computer...
Edit: I remember I also had an old webcam with no drivers for Windows 7, just XP, so I installed it on a virtual machine and it worked - since it's an old cellphone you could try that if nothing works...