Hi, some months ago I started a topic with a problem with Nod 3. It slowed my computer a lot when working with executable files: http://www.wilderssecurity.com/showthread.php?t=201268 From solcroft: The problem with NOD32's advanced heuristics is that it's very resource-inefficient when it tries to emulate and analyze large and/or heavily obfuscated files. Large files aren't a problem on my computer (because they don't exist), but even on files as small as 150kB, NOD32 v3 can take up to 16 seconds to scan it if it is encrypted with complex packers. The problem is CPU consumption, not RAM. There's nothing you can do short of turning off advanced heuristics (and heavily castrating NOD32's detection rate), it's really up to ESET to fix the problem. I wonder if this has been improved in version 4. Can somebody please give me some information on this? Thanks in advance.