My laptop will not let me logon so how do i fix

the data is vry insufficient..itz not clear as where the system is limiting u access..also the os platform u r using..

assuming, that u r having problem opening while logging into windows..
atthe bootup n at "User Logon Welcome Screen" (user accountmanagement)..press Ctrl+Alt+Del at a time and only twice..it'll bringClassical Logon Window..now in the user name type 'Administrator' andhit enter..hope u'll b logged in..

else, Boot the machine up insafe mode, to do this restart the computer and repeatedly tap F8. Youwill see a sub menu with safe mode at the top so select that. Wait forwindows to boot up and then log in to an account which has administratorprivileges..

however, after logging on, do the following:
hv a licensed and UPDATED antivirus installed (i prefer avg/kaspersky, , without updation a full version 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..'removeall theunnecessary startup items from here..(if u can't find what toremove,post me/us in ur comment with all the items listed in each nevery 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..
disable thefollowing: a) 'Automatically Restart' right click onmy computer->properties->advanced->startup nrecovery->(uncheck on the) Automatically Restart; b)'Error Reporting'right click on my computer->properties->advanced->errorreporting->disable error reporting->(uncheck on the) 'but notifyme when critical error occur'..
Increase the size of Virtual Memory, Initial: 1440; Maximum: 2880

always better to seek professional advice of ur system admin/vendor....

What is the Operating system (ex. XP, Vista, Mac. That will change how you approach the problem.

Ryan Frame
Creative Energy Associates Technical Center