Question Detail,

I have a latitude e5520 running Windows 7 Pro. I don't know what I did or didn't do but everytime I start-up my laptop I get an message box stating, 'error handle'. Oddly enough, I click the x to close and everything works fine. However, I know something is wrong or I wouldn't get the message. Please help! Thank you.

Solution,

Hi,
1. Have you made any changes to your computer prior to this issue?

2. What is the complete error message?
Follow the suggestions and check if this helps.
Step 1 : Safe mode
You may start your computer in Safe mode and see if the issue still exists.
Start your computer in safe mode
http://windows.microsoft.com/en-US/windows7/Start-your-computer-in-safe-mode

Step 2 : Clean boot
If the issue doesn’t persist in Safe mode with networking you may perform clean boot to check if any third party services are causing this issue.

How to troubleshoot a problem by performing a clean boot in Windows Vista or in Windows 7
http://support.microsoft.com/kb/929135
Note : After troubleshooting follow Step 7: Reset the computer to start as usual