This file is part of what is call .NET.  It's a programming framework in Windows introduced a while back. 

Not knowing the full path of the file and which operating system version you're running, I don't know which version is causing the problem and I can't be specific on what to do.  What you'll need to do is repair the installation of .NET.  For Windows XP, under Control Panel > Add/remove programs, find the Microsoft .NET Framework and click on Change/Remove. Pick the repair option to return .NET to it's original state.  The only issue with doing it is that you might have to repair any software installed which uses .NET.  Most packages include the Repair option and they'll also be listed in Add/Remove programs.

If you want more specific instructions, post your OS and the full path to the file and maybe someone can provide more specific instructions.

It is a Inspiron 1545  With windows 7... I repaired it but it is still stopping my virus scan on the same file

What did you repair?  What's the path to the file?  You might also try to repair the installation of your virus scanner.

NET. Framework 4 Client Profile... I went to control panel then to Uninstall or change a program

Its the file name that is the topic of this... I tryed looking it up but cannot find it...

There are at least 4 versions of .NET and usually more than one gets installed on the system because they're all different.   That's why the path to the file is important.  Encoded in the path will be the version number which will indicate which one to repair.

If you can't see the path on the screen, look around for a log file generated from the virus scanner.  You may be able to get to it from the program menu or find it on the hard drive somewhere.

OK, I found how to fix it.  The file is part of .NET 2.0 which is embedded in Win 7.  To repair the .NET components, open a command window (Start > Run CMD) and copy the following command into the window

msiexec /fpecmsu {C09FB3CD-3D0C-3F2D-899A-6A1D67F2073F} REINSTALL=ALL /l*v %temp%\netfx20sp2_repair_log.txt /qn

I found this in a Microsoft Blog post here.  It's technical but what you're doing is running a repair on the .NET 2.0 component of Windows 7.  That should fix the problem.  Check the virus scanner after you do this and see if it works.  If it does, run Windows Update and check again.  If it fails, there's something wrong with the virus scanner.  If it works, you're done.