I use Ninite to keep my plugins and basic programs up to date. But today I think it may have broken something on my system. I ran Ninite and it updated three things: Paint.NET, OpenOffice and my Flash plugin. I have done this several times before on the same computer and never had any problems. However after I ran it today Steam now takes almost 10 minutes to start (sometimes, it varies every time I try). The first time took 7 minutes, I tried again just now and it took 10 minutes. This morning I opened it in less than 20 seconds!
What the heck happened? I tried a bunch of the usual fixes, I deleted clientregistry.blob and some of the .DLLs. Those redownloaded fine when I restarted the program but Steam still hangs for a bit at the "connecting to account" stage.