快乐大本营20迪丽热巴:谁能帮我解决这个问题

我的电脑是5年前的正版WindowsXP HOME系统.没有更新过，可现在老是出一个叫信使服务的提示.上面写到:
从SYSTEM到ALERT的消息
Microsoft Windows has encounted an Internal Error
Your windows registry is corrupted.
Microsoft recommends a complete system scan.
Microsoft recommend
http://www.msreg.com
To repair now for a free download.
当点击确定以后会弹出另一个信使服务提示:
在什么时间从SYSTEM到ERROR的消息
STOP!
SCAN CRITICAL SYSTEM ERRORS
To fix the errors please do the following:
1.download Registry Repair from: http://www.correctreg.com
2.Install Registry Repair
3.Run Registry Repair
4.Reboot your computer
FAILURE TO ACT NOW MAY LEAD TO DATA LOSS AND CORRUPTION!
当点击确定以后会弹出另一个信使服务提示:
STOP! WINDOWS REQUIRES IMMEDIATE ATTENTION.
Windows has found 55 Critical System Errors.
To fix the errors please do the following:
1.Download Registry Update from:www.regfixit.com
2.INstall Registry update
3.Run Registry update
4.Reboot your computer
FAILURE TO ACT NOW MAY LEAD TO SYSTEM FAILURE!
当然有时还有其他的内容,不过是大同小异.五分钟就跳出来一次
怎么才能关闭这讨厌的信使服务