Does .NET Framework 3.5 SP1 require restart?

Question

We have a production machine and are trying to slowly introduce some 3.0 and up features on our web application. 3.5 is installed but I would like to upgrade to SP1, I would just like to know if it requires a restart of the machine in the end so I can schedule some down time.

Thanks!

EDIT: so it did require the restart, thanks guys for the answer...but the hosting company didn't give us the rights to do so...LOL

Answer 1

3.5 SP1 updates 3.0 to SP2 and 2.0 (which contains the CLR) to SP2. If the CLR is loaded in any process the DLLs will not be writable, and a reboot will be required.