software delivery failed - update manager

Hi,

I am getting software delivery failed error - below from event viewer - anyone come across this before?

Name: Application
Source: SophosUpdateManager
Date: 29/09/2015 10:35:15
Event ID: 16388
Task Category: None
Level: Error
Keywords: Classic
User: N/A
Computer: 
Description:
Decode operation failed when decoding product release 'A845A8B5-6532-4EF1-B19E-1DB2B3CB73D1'. Details: Checksum error: 7d37ab23bedf52720fd31ee2d19ec198x000 -> libeay32.dll
Event Xml:
<Event xmlns="schemas.microsoft.com/.../event">
<System>
<Provider Name="SophosUpdateManager" />
<EventID Qualifiers="57344">16388</EventID>
<Level>2</Level>
<Task>0</Task>
<Keywords>0x80000000000000</Keywords>
<TimeCreated SystemTime="2015-09-29T09:35:15.000Z" />
<EventRecordID>1427221</EventRecordID>
<Channel>Application</Channel>

<Security />
</System>
<EventData>
<Data>C:\ProgramData\Sophos\Update Manager\Working\.\Decoded-SDDM\A845A8B5-6532-4EF1-B19E-1DB2B3CB73D1</Data>
<Data>sum</Data>
<Data>A845A8B5-6532-4EF1-B19E-1DB2B3CB73D1</Data>
<Data>RECOMMENDED</Data>
<Data>A845A8B5-6532-4EF1-B19E-1DB2B3CB73D1</Data>
<Data>Checksum error: 7d37ab23bedf52720fd31ee2d19ec198x000 -&gt; libeay32.dll</Data>
</EventData>
</Event>