I’ve been doing a lot of work with Linq to SharePoint over the past month, creating content for my new SharePoint 2010 development book. You know it’s a strange thing writing a technical  book, when you first start out you wonder how you’ll fill the pages. As you get into it though you very quickly find that there’s a lot more stuff you’d like to add but don’t have the space. I like to take things to bits completely before I start wiring about them. It’s always good to know where the limits are before you think about scenarios...

I thought I’d have a read through the technical preview docs for SP2010 and came up against this problem: I’ve seen this problem a few times before when tying to access .CHM files. It often happens when you download SDK documentation from the web. (Unsurprisingly since it’s a security feature designed to prevent downloaded content from causing mayhem on your PC!) To fix it: Find the file that you’re trying to view, in my case: SPPT2010TP.CHM Right click then select Properties: Hit the Unblock button...