Windows System Error Messages/Reporting in running program

Hello,
My own brother and his girl have difficulties with this computer system and I am also trying to assist them. The system is just a workweek aged and he or she has an issue with Home Windows. Every time she attempts to begin in place anything, my spouse and i.e. Outlook, MSN Messenger and many others error messages appear. She will mail the error report to Microsoft but that is it. Nothing else may be powered by the woman PC without a problem message showing up.
Are there any suggestions on how we can stop this error from coming? She got onto the actual windows Update web site to help obtain any kind of latest updates. We've got attempted debilitating Sector Security along with starting in safe mode and debilitating the error messages/accounts but still have the common problem.
Please help.
Regards,
