Thanks for visiting Apple Support Communities.
If applications such as Finder are behaving unexpectedly after upgrading to Mavericks, there are a few steps that can help isolate or resolve the issue.
First, try booting your computer into safe mode:
Mac OS X: What is Safe Boot, Safe Mode?
Mac OS X: Starting up in Safe Mode
If your applications are working normally in safe mode, this usually means OS X is fine, and the issue is caused by conflicting software in your user account.
Next, see if applications behave normally in a new user account. The steps in this article also apply to creating a new user in Mavericks:
OS X Mountain Lion: Create a new user account