The following can be considered a risky approach but I like taking risks. Dont know about you.
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That seems to be a strange problem. Since the symptoms show this is a wireless problem how about if you disable the wireless card on the laptop when you are logged on in office. then switch off the laptop. Now take it out of the office and start it up again. See if it lets you start up the machine now.
beware , when you want to get back on the network , you might have to start up the laptop , enable the wireless card, and then restart to get back on the office network.
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mobajwa