Technology Forum

Hi. I'm new to the forum and in no way an expert, so apologies for my lack of knowledge. I'm running a Philips X58 freevents laptop, Intel core 2 duo, 2Gb RAM. I have windows vista and Ubuntu 7.10 as a dual boot system. My problem is this. My laptop refuses to work for more than an hour when I am in the office. It will randomly reboot throughout the day, and after reboots will hang on the Intel screen before it reaches the Grub Loader. Specifically after it says mouse initialized. This is about three quarters of the way to loading before the grub screen appears. When at home it works fine. I will run it all day at the weekend (18hrs+) with no reboots at all. and the tasks I perform are exactly the same. The difference at home is that I use a wireless network and at work an Ethernet connection. But even with the Ethernet cable out the same behavior occurs. There is no discernible difference in temp between the two environments. I have tried unplugging it and running off battery at work and still get the reboots. I am baffled. Please shed light on this weird behavior. Thanks in advance, Andrew