Windows .exe Crashing when loading worlds in modded minecraft

[boogaloo1001]

Operating System and bit type: Windows 7 64-Bit
Java version/update and bit type: version 7, build 45, 64-bit
Launcher version: v1.3.2
Console log and crash log, pastebin.com links: http://pastebin.com/1gGQjEgx , http://pastebin.com/0RGtgeJt .
Have you tried following the troubleshooting guide? : Yes, twice.
GB's of memory allocated: 7gb, I have tried just running 4.5gb.
Description of the Issue: I am having trouble with modded minecraft. This same bug has plagued me through 3 different 1.6.4 modpacks (Horizons, direwolf20, and monster). The launcher runs fine and the mod packs launch just fine and everything loads up to the main menu but once I select my single player world and it starts loading, Minecraft crashes. It will sometimes run fine but it crashes more often than working. I have all my drivers up to date (even my graphic card drivers). I have thought of trying Eyemaz's permissions but I don't think that will help. I didn't have any problem with the 1.5.2 packs. Anyway Thanks for your time and merry Christmas.

 

[boogaloo1001]

I don't know if it's related but my worlds are also being corrupted (only sometimes) and are no longer seen by the game

 

[lavarthan]

(The requested operation cannot be performed on a file with a user-mapped section open)

Not sure if this will completely fix your problem, but this error is caused by an over zealous antivirus program. Try adding the launcher folder, C:\Users\BrandtSmith\Desktop\FTB\, to the exclusion list of your antivirus program. After doing so if you are still experiencing problems please post a new console log to pasetbin.com This time you might want to register for a free account so your log does not get deleted in 24hours after posting it. Check here for more info.

 

[boogaloo1001]

Ok will do. Thanks for the the info. hopefully it works. merry Christmas