點解我個電腦會咁？？

我個電腦係Window2000 當我登入哥時,一開始就出現個 mouse ,然後出現個桌面,再出現開始哥列,再等多會,就全個畫面變做 blue 色,有D 英文字係入面.
*最先寫: (大約)*
(0.0000000001x0.000000002) * 知後有好多Eng字...再出現*: if this is the first time,*知後唔記得* if this is the second *知後又唔記得,知後有好多好多Eng 字,我睇唔明*
有時要開好多次先開到,有時上上下網又會.....點解會咁??? 點怎解決??