One of the quircks of Windows 8.1 Update 1 that I never had before was that every reboot, the moment I open any folder, my desktop icons become "not clickable" and the icons in that folder all turn white/blank for 1 minute then they would turn back normal

I and many other users have been experiencing this according to this thread :

Anyone Noticed Desktop Icons Not Responsive on Win 8.1 Update 1

Yeserday I had to format my laptop coz I bought a new SSD. So I installed Windows 8.1 Update 1 x64 and noticed that the freezing icons wasn't there. Anyway, I started doing my usual tweaks and stuff and noticed, the moment I disabled OneDrive via a registry file the create an entry to disable OneDrive, the next reboot, the problem started!!

So I enabled one drive again by deleting the key and rebooted, no more problem or freezing.

With that said, I decided it is best not to mess with the OS, so I switched from Dropbox to OneDrive completely and paid $25 USD to get an additional 50 GB, but this way I know I won't face any problems from messing with the OS.

I had to buy the extra space coz I needed it and certainly don't want to have 2 cloud apps running on my computer at the same time.