Here is Downloads link of Acer beTouch Series / E100 PC Suite/ Sync for Windows 7, XP and Vista. This page also provide how to Update Software to make more advantages your Operating System. Disables the popup window when switching to silent mode while using other programs, Improves system stability after performing a clean boot, Google maps stability,. Fixes the problem where the GPS viewer doesn’t work when AGPS is enabled and Implements improved translations.
This AcerE100 is using Windows Phone 6.5 OS. So you can use the ActiveSync to connect this device to computer. Please follow this link below to download :
Download link PC Suite for Windows XP 32/64-bit (Service Pack 2 or above),
Download link E100 for Windows 7 & Vistan (32/64-bit)
Download and install Zune software to connect
If you can connect this device to PC you can doing update your Acer beTouch Series / E100 PC.
Update software WP 6.5 on Acer E100. For assistance, please contact the manufacturer of the device or software