There are several ways to disable the Error reporting service of Windows 7:
Method 1
Click on Start > Control Panel > Action Center > Change Action Center Settings.
Click on the "Problem Reporting Settings".
Select "Never Check for Solutions".
Click on OK to validate.
Method 2
Click on Start > Run > Type "services.msc"
In the window that opens (Services), look for the following entry in the the right pane:
"Windows Error Reporting"
Double-click on this entry and set the "Startup type" status as "Disabled".
Click on OK to validate.