The file jrvlp1.dll belongs to the spyware detected as Spyware/Lefeat by Panda products that offer protection against this kind of malware.
...
We are enclosing a link to the updated signature file.
http://www.pandasoftware.com/virus_info/disclaimer.htm
This file has been created in order to detect and disinfect your malware. We will shortly make available to all our customers the new certified signature file, which will be accessible through the automatic updates.
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Best regards,

PandaLabs

Panda Software
Buenos Aires 12
48001 BILBAO - SPAIN

Hi

thank you for your email. The file jrvlp1.dll that you sent to us for
analysis was a potentially unwanted application, LinkOptimizer. An IDE
file that will allow Sophos to detect this should be released on the
Databank and our web site later this afternoon.

Regards

Hello
New detection has been added
Detection will be avaliable in an hour

McAfee(r) Avert(r) Labs Sample Analysis
Issue Number: 2437036
Identified: LinkOptimizer
Avert(r) Labs, Bangalore

Thank you for submitting your suspicious file.

Synopsis -

The sample submitted is a Potentially Unwanted Program (PUP). It does not
contain a virus, and is not considered a trojan because it does not damage
systems maliciously.

Attached is a file for extra detection, which will be included in a future
DAT set.

Your request has been analyzed. New virus record has been added.
Adware.Flashkin


Thank you for the cooperation

The Windows PE (I386,DLL) file jrvlp1.dll determined to be Clean
Potentially Unwanted.
While our researchers have analyzed the file and found nothing that
could be considered malicious, it is possible that in particular
circumstances this file may be unwanted. Adware, spyware and other,
related types of application fall into this category.

Aliases reported by other AV products are listed here:
(AdWare.Win32.LinkOptimizer.a)

We have analyzed your submission. The following is a report of our findings for each file you have submitted:

filename: jrvlp1.dll
machine: AVCAutomation:
result: This file is detected as Trojan.Linkoptimizer. http://www.symantec.com/avcenter/venc/d ... mizer.html

filename: jrvlp1.upd
machine: AVCAutomation:
result: See the developer notes

Developer notes:
jrvlp1.dll is non-repairable threat. NAV with the latest available definition detects this. Please delete this file and replace it if neccessary. Please follow the instruction at the end of this email message to install the latest available definitions.
jrvlp1.upd This file is dropped by, or is an artifact of, a worm or other malware. By itself the file is not malicious or infected, but should be deleted.