I have an Extensa 4420 with Windows 7 Home Premium installed. Every time it resumes from hibernate, it locks up after about 1 minute. I've tried installing different versions of the video driver, touchpad driver, and wireless card, but none of those have fixed it.
Thanks for the link. I'm not sure how I missed that. I thought I had done a decent job of searching, but obviously not.
That definatley helped! The Acer web site lists two video drivers. I thought I had tried both, but obviously not. When I tried to reinstall one of them, this time I noticed a message that the video driver portion of the install had failed. I uninstalled everything related to the video driver and started over. The install succeeded and it appears that driver (ver 8.593.100.0) has solved my problem.