UDK Freezing computer in material editor

Progg

So I have had this rig up and running for around 8 months. The pc hasn't had any problem whatsoever until now. I've been using the UDK on and off for about the last 2 months, with no problems. Recently I have been messing with the material editor to develop a celshaded material, and for some reason it has been causing my computer to completely lock up. I have 64 bit Windows 7... and I have never had a full on freeze in any program or game... I have always been able to ctrl+alt+del and fix it, but not with this bug... the pc locks completely and requires a power button held restart. For some reason the material editor is completely locking the pc up when I go to add new nodes in a fairly complex material.

Is this something that is common? I hope it's not my rig, but I have no problems playing any intensely graphic game or running Maya / video editing software.

SPECs:
Windows 7 64 bit
4 gigs RAM
AMD 955 Quad Core
ATI Radeon 4870 HD 1 gig

r4ptur3

i also run 64x win7 and was having a problem opening the material editor. It worked fine for a month or two and then spontaneously caused UDK to crash out completely. I ended up re-installing the UDK and it works fine now. I was never able to figure out what caused the problem or a real solution for it.

Progg

Ok... atleast it's not just me

omegalith

Do you have antivirus running. I had a similar issue where UDk will crash in material editor, cuased by my anti-virus program scanning files in real-time.

NeonMonkey

Thank you omegalith. No one else had a solution for my problem and then I just disabled my antivirus and suddenly the material editor in UDK works as expected. A thousand thank-yous sir!!

iamonlywill

I'm sorry this is a bit of thread-necro, but I am also having this exact problem and it's stressing me the hell out. I'm currently just reinstalling UDK after trying a variety of "soft" solutions first. I'll attempt the AV test next if it still doesn't work, I'll get back to you with my results.