sluggish computer net clr problem

I posted this yesterday as a .net clr icon problem but received no help.
Does anyone know what .net clr is and why I have two icons on my desktop now
- and a slow running computer. The process freeze and I have to shut down
and reboot.

I am using Windows XP and Internet Explorer 6 (I think) I can't figure out
where I can find that information. I have Norton Antivirus and Zone Alarm.

A few days ago my computer started getting sluggish and programs started
freezing. I would try to close them with task manager but task manager would
replicate itself until I had about 50 versions of itself running. Finally I
could get it closed and shut down my computer - then restart it.

Now I have 2 icons on my desktop that says: 6.2152; .NET CLR 3.5.30729) I
can't open them. I've tried putting it in the trash bin but it keep
appearing.
What is this? How do I get rid of it? What's wrong with my computer?

When I right click on them I get this information:
30729)XXXXXXXXXXXXX File
Unknown application
325 bytes (325 bytes)
size on disk: 4.00 KB (4,096 bytes)

I also don't like the way my computer seems to keep working when I'm not
doing anything on it. Microsoft seems to keep downloading and updating stuff
on me that I don't want.



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