My brother is having a Dell laptop running with Windows XP SP3 and Office 2003. I keep this laptop updated with all recent patches from Windows Update. There was no problem until yesterday night but today morning when he booted his laptop, he found that none of his programs are running.
When I checked the laptop and tried running any Office application, no matter MS Word, Excel, PPT or anything, I use to get an error message saying “Application Not Found” whereas I can see their icons on my desktop. Similarly when I try opening McAfee Security Center , it says "Choose the program you want to use to open this file". For troubleshooting when I went to Control Panel and tried opening anything, for example “Add and Remove Programs”, it gives me an error saying “c:\WINDOWS\System32\rundll32.exe Application Not Found.”
When I checked the directory I can see rundll32 file is still there. Any idea what has went wrong with this laptop suddenly overnight? How can I get rid of these problems?
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