I have had ACAD 2013 one year and have had absolutely no problems with the program; using Windows 8 then 8.1- updated 2 months ago.
Recently the program/drawings will open but sometimes the functions are irratic and freeze up. I can perform some work then suddenly the commands don't type in and it locks on fence/polygon select mode. After that all tools are frozen, but can still move around workspace and open up new files. Have tested on several .dwg files and the malfunction occurs consistently on all files.
Am up to date on Service Pack 2 and all Windows updates. Also tried the repair feature through Windows without success.
Any suggestions-ideas on the problem/solutions would be greatly appreciated!