What are spr.exe files? Is that a virus or worm?

I have found several spr.exe files in my local settings, temp folder.  My computer performance is slower than it used to be, and I found these files in an attempt to clean up the C drive.

I have Windows XP Home, it's a Sony Vaio computer. I have Norton Security.

One of the SPR files is listed in a blue font, which I am assuming indicates it's a system file.

Two of the SPR files show as file type application. One shows as a temp file.

SPR.18F3.EXE  (BLUE FONT)

SPR.196A.EXE  (BLACK FONT)

SPR.196A.TEMP (BLACK FONT)

How can I find out if these are bad files or what application they belong to?

[Malware Removal Specialist]

spr.exe are associated with plenty of malware/worms. It is hard to say for sure without some scans though.

We can take a closer look.

Download HijackThis  to your desktop.
Double-click on the file you just downloaded.
Click on the "Install" button to install.
It will by default install to the directory - C:\Program Files\Trend Micro\HijackThis
Please do not change the default install location.
Upon install, HijackThis should open for you.

Next click on the "Do a system scan and save a log file" button.
HijackThis will scan and then a log will open in notepad.
In the top left of the notepad window click "File" > "Save As" name it hijackthis and then save it to the Desktop.
Please save the log as a text (.txt) file.
In your post, add the log as an Attachment.

* Don't have Hijackthis fix anything yet. Most of what it finds will be harmless or even required.
** Don't use the Analyse This button. It's findings are dangerous if misinterpreted.