sometimes it happens to me (when im talking to someone important on msn and racing). It's rare, but there are times that it takes almost 20 seconds to switch between windows and lfs... same resolution and refresh rate.
Problem signature:
Problem Event Name: APPCRASH
Application Name: LFS.exe
Application Version: 0.0.0.0
Application Timestamp: 4958fd75
Fault Module Name: atiumdag.dll
Fault Module Version: 7.14.10.636
Fault Module Timestamp: 496d6d9d
Exception Code: c0000005
Exception Offset: 0004ad03
OS Version: 6.0.6001.2.1.0.768.3
Locale ID: 2057
Additional Information 1: 64ea
Additional Information 2: cce9f653dd0f8eec446de52154d2f82d
Additional Information 3: 8dc8
Additional Information 4: 0a5bb3b56cc694b98e1f4a3a36903eec