While installing desktop sync app such as drop box following two resources will be used a lot
CPU
RAM
Explanation:
CPU usage has been increased while installing desktop sync application, because it depends on the number of files that need to be synced. If the number of files is high the CPU usage will increase.
The need of memory such as RAM is also increased while installing the desktop sync application. As the number of files that need to be synced increases the RAM usage is also increases.
That'll happen to me every once in a while. What you have to do is reload the page. If it still doesn't let you answer, try exiting out the page, and getting back on it with a new tab.