Analysis: In our daily work and summary, we met a large number of users whose programs were popped up or minimized in full-screen or window games. After investigation, we found that such problems were caused by other processes jumping out of the background. It may be a plug-in, an assistant or even a virus, or it may be a user's software. So our top priority is: clean-up process, artificial virus. Environment: WindowsXP/Win7 tools: system slimming optimization package, 360 game optimizer (recommended boot), game optimizer (recommended boot), 360 software assistant, LLfix patch, group policy operation: group policy: modify group policy gpedit.msc- computer configuration-management template-network -qos packet scheduler-limit the reserved bandwidth-enable-set to "0".