I had a problem with my MacBookPro the other day. It lost Internet connectivity. It couldn’t get an IP address from the DSL router. Restarting the router didn’t help. Nor did stopping and starting Airport or using a wired connection.

At first I figured the router was fried. But then, I restarted the Mac and lo! connectivity came back.

I wrote it off as a once off and didn’t think any more of it.

Then over the next few days I had problems with Firefox freezing. Uninstalling plugins didn’t help. What did fix it was closing all the tabs which contained Silverlight content.

Then the problem with the Mac losing Internet connectivity recurred. Several times. Both at the home office and outside of it.

I finally had an Aha! moment. I searched the hard drive for all occurrences of Silverlight, found the Silverlight plugin, deleted it and re-started the Mac.

I haven’t lost Internet connectivity since!

Has anyone else had this happen to them?