..EXE files always open with Notepad or any other application:
http://windowsxp.mvps.org/exeasso.htm

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http://www.microsoft.com/wn3/locales...eAPostAsAnswer
Mark L. Ferguson
..

"SonyuserNYC" <SonyuserNYC@discussions.microsoft.com> wrote in message
news:474BC063-F19A-4F80-AB51-E8DC582BE29D@microsoft.com...
> I have a 5 year old Sony desktop running Windows XP. The computer has a
> partitioned hard drive and the C drive filled up to near capacity. I have
> been trying to take off or move programs, but none of the utilities work
> except Windows Explorer. When I look for files such as cleanmgr they are
> in
> their correct directories but appear as txt files.
>
> I thought originally the files would not work because of lack of
> processing
> capacity, but now I am wondering if this is a virus. Can anyone help?