Please help me … I’m working on my graduation project … and Each Time I try to work on unity … it stop working and just freezing … I’m using the trial version … I was using 3.3 then I thought the problem is the version it self … so I use older version 3.1 and the same problem goes up !!! … I test it on other device … but the same thing happen … please can any one tell me how can I solve it … I just can work on it 10 seconds only … and if I forget to save my work on this limited time … I will fail on my project :((( …
by the way my operating system is windows 7 64-bit and the other device which I test the unity on it has the same version
Your application stops working or Unity stops working? I hate to sound like Dell tech support, but have you tried rebooting?
UNITY stoped working … and sure i reboot it and I remove it and install it again too
That is not good. Does it produce any crash logs?
no it just stop working and I had to to open task manager to close it
I’m using Windows 7 ultimate 64-bit Service Pack 1
Any one can help me ???
try installing it on a different computer, be sure you are running it as administrator, try getting the most recent window’s updates and video card drivers, and just pray it works 
does this happen with all projects or just the one?
If its the one project, try going to its folder structure and moving out assets one by one, after each time try and run unity, maybe its a problem with something you loaded into the unity scene.
ok I will try it and I will tell you what happen 
all projects 
Try it on a different computer with a clean Unity install!
Unity on 64 Bits OS → problems with anti virus. Try to disable it or the firewall. It happens to me and i had to change to 32 bits
I never have had issues with unity and AVG on windows 7 64 bit.
Yeah it’s fairly unlikely that is the Anti Virus, but it’s worth a try.
I tried several Times !!
really !!! … I’m using BitDefender … I will turn game mode on and I will test it now then I will try to disable it … thank you 
Thanx All … I remove my antivirus and it works well now … Special thanks to IndieStudio
Good thinking, IS. I was out of ideas.