I upgraded to SP2 over the weekend. I didn't uninstall the MP nor did I uninstall WAIK before I began. Those objects upgraded with zero problems. The only problem I encountered was at the very beginning when you choose your download location for the updates.
Every time I choose the download folder it was state:
"component manifest was not found or it was invalid"
Well I simply moved the
ConfigMgr.manifest.cab
ccmsetup.cab
to a new folder and tried again. This time it downloaded and start the install.
I cannot say how long it took, but It wasn't several hours. I minimized the window and read the Sunday paper. When I returned it was pretty much done upgrading.
A restart wasn't required but I did it anyway since I like to restart after major upgrades and installs to ensure the platform is stable.
