When trying to load AT&T Communications Software 6.10.025 for a Quicksilver, drivers start to load your computer freezes up. A MS Window pops up with Sierra Wireless Drvinst App; name: Drvinst64.exc; Event: APPCRASH. This happens using a data phone, CD or download.
Also, you downloaded a newer version 7.2.610, it loaded successfully, but would not see a data phone. You are running Microsoft Windows Vista operating system. A Quicksilver data phone works fine on your Cradlepoint router.
You have tried loading that software many times, uninstalling AT&T Communications Manager each time that it stops running. What model number is your Quicksilver data phone? If it worked before you could try doing a system restore.
No you won't lose any data by performing a system restore. Have you tried completely removing that software and reinstalling it from your CD? You can boot into Windows Vista safe mode to try a repair of that software or uninstall it.
System restore only restores system files to a previous date. Your not reinstalling Vista, your just restoring vista to a previous state that AT&T Communications software worked. Open System Restore by clicking a Start button.
Clicking All Programs, clicking Accessories, clicking System Tools, and then clicking System Restore. If you are prompted for an administrator password or confirmation, type that password or provide confirmation. You then pick a date in the past when you think your quicksilver worked with your laptop.