How to fix selection eror.?

PLEASE GIVE ME SOME ADVICE ON SELECTING EROR.

I CLICK ONE ICON AND EVERYTHING IS SELECTED.

same thing happens when i select units in a strategy game.

plus,sometimes my typing gets horibly mixed up.

the computer thinks i'm constantly holding shift although i'm not.

Any free antivirus programs on web.

pdlus selecting eror makes imposible to unselect somthing.

All this hapened in 1 day.

Although i encountered this problem with othere versions of windows.

i have XP.

hmmm,it seems eror is not so bad now,that I am actualy able to type this mesge.

How to fix selection eror.?free antivirus download

have you check you keyboards where as some software are there it will find what keys are hit in a time check this out where as may be hardware failure.

else check the sticky keys and hot keys in your Windows.