Nisken
for a seriousupdatepreparation,used theMSrequirements
http://www.microsoft.com/en-us/windows/compatibility/compatcenter/home
http://windows.microsoft.com/en-us/windows-8/upgrade-to-windows-8
there areno problemsifkeep to theto it. in the forumyou can find alldrivers
Use Clean Install for Windows 8.1 and you had no problems.