It goes without saying that computer running slow is a common problem we all face, a pestering one indeed! Last week, I had to format my computer as it was running at an annoyingly tortoise pace. After formatting it, I installed Visual Studio 2008. When tested Visual Studio 2008 worked all fine. However, when I attempted to install SQL Server 2008, I was confronted with an error about NET Framework 3.5 missing.
SQL Server 2008 Developer Edition Install fail due to .NET Framework 3.5 missing
For a couple of seconds, I was in a state of surprise, as I had Visual Studio 2008 and it worked absolutely fine; without .NET Framework 3.5 VS 2008 should have not worked. I had a hard time wrapping my head around this idea. I searched online for the solution and successfully found the following link, which clearly gave explanation to my probing mind. As CSS SQL Server Engineers have already explained it perfectly I will be not talking about the same again, but I recommend this as a good read.
If you have installed VS 2008, install VS 2008 SP1 as well.
Reference : Pinal Dave (http://blog.SQLAuthority.com)