电脑开机启动时蓝屏，急救？

装的是winxp系统，现在系统启动时有点不正常。开机时开机画面都正常，提示欢迎界面后经常蓝屏，有时正使用机器时就出现蓝屏。屏幕上有大版英语提示: A problem has detected and windows has been shut down to prevent damage to your computer PAGE_FAULT_IN_NONPAGED_AREA If this is the first time you`ve seen this stop error screen,restart your computer.If this screen,restart your computer.If this screen appears again,follow these steps: Check to make sure any new harware or software is properly installed.If this is new installation,ask your hardware or manufactuer forany windows updates you might need. If problems continue,disable or remove any newly installed hardware or sotware.Disable BIOS memory options such as caching or shadowing.If you need to use safe mode to remove or disable components,restart your computer,press F8 to select Advanced startup options,and then select safe mode. Technical information: ***STOP:0x00000050(0xBADOB154,0x00000000,0x80580E27,0x00000002)Beginning dump of physical memory physical memory dump complete.Contact your system administrator or tenchical sllpport group for further assistance. 搞不懂这是啥意思。出现这些提示以后就停在那不能正常启动了，只有强行关机。有时要重复几次才能正常开机。 安全模式可以正常进入，首先谢谢各位了，只是这些方法都不行，不重装行不行呀，我一直用的是瑞星杀毒和防火墙，刚装的系统也没有多久，才一个月吧，内存，网卡也折过了，CPU风扇也正常呀，没有什么灰尘，硬盘就是NTFS的呀