Please updates your OS windows 8.1 to Windows 8.1 update 1.
Do a Windows Software updates!
That goes the same to your Microsoft Office!
Update your Web Browsers.
And Adobe Flash , Adobe Acrobat Reader if any!
Seams to be some work, I don't know if I want to go for all this... problem with updates is that sometimes (usually) at the end things still don't work..I might give it a try.