i did not have that problem in acad2012, so it must be a acad2013 problem
I doubt it is. It might be an install problem but highly unlikely a problem with the software itself. Make sure you have any service packs installed. Maybe try to repair the installation.
Is this the same machine as you had 2012 in?
Do you still have 2012 installed?
Have you checked the settings to see if there are any differences?
Did you install the 64 bit version?
Are your computer specs sufficient?
Is the computer maintained on a regular basis with regular disk cleanup, defrag, virus/malware scans, drivers up to date, etc.?