Whenever i try to write in a document or the

though itz not clear to me..what os platform u r using..
assuming that u r using win xp pro sp2 and is using a licensed and UPDATED antivirus (i prefer avg/kaspersky)..

however, open control panel->accessibility options->in here under each tab (esp. 'keyboard' tab)->click on all the settings individually->and turn off by unchecking or remove the check marks from "Use Shortcut"..

lightly strike/tap the keypad using ur hand..

increase the virtual memory size: open 'Run'->type"sysdm.cpl"->click on 'Advanced' tab->click open 'Settings'submit button under Performance->click on 'Advanced' tab->hereu'll find 'Virtual Memory' settings->click open 'Change' submitbutton in here->type the 'Initial Size (MB): 1440'; Maximum Size(MB): 2880'..->click 'Set' submit button->pressOK->OK->Cancel..->now restart the pc..

hv a licensed and UPDATEDantivirus installed (i prefer avg/kaspersky, , without updation a fullversion antivirus is useless)..
download, install n run microsoft kb890830..http://www.microsoft.com/downloads/details.aspx?FamilyId=AD724AE0-E72D-4F54-9AB3-75B8EB148356&displaylang=en..
download n run Startup Control Panel..http://download.cnet.com/Startup-Control-Panel/3000-2094_4-10039330.html..'removeallthe unnecessary startup items from here..(if u can't find whatto remove, post me/us in ur comment with all the items listed in eachn every tabs herein)..
remove all unnecessary software from add/remove programs..
download, install n run 'Advanced System Care Pro'..http://download.cnet.com/Advanced-SystemCare-Pro/3000-2086_4-10399324.html..

alsocheck the ram(s)..open it/them, rub itz teeth gently with a eraser, toremove any oxide and or carbon formed..resit them again into theslot(s)..

for better professional supervision, do contact ur system admin/vendor....