Strange behaviour in Windows 8

[ic1male]

Has anyone experienced any odd happenings lately? Random things that have happened to me this week (after zero issues during the first month) are loss of keyboard when resuming from standby, random explorer crashes and today, a complete logout from my user account as I was just browsing the web!

 

[ic1male]

I did install Dropbox yesterday, that's the only change. But on reboot, Windows Update installed something. Maybe it was to do with that. New drivers perhaps.