It appears that a later release of your definitions has resolved the problem. We noticed that the workstations affected all had a older definition set. We forced an update and the installations was able to proceed.
The product we where tring to install was Cisco Jabber 9.7.3.18968. We have not had any issues with previous versions or any other application installations.
The detection was on these files below, the second is an interesting one with the characters appended to the end of the file name '>>_______'
C:\Windows\ccmcache\5w\CiscoJabberSetup.msi
C:\Windows\ccmcache\5h\CiscoJabberSetup.msi>>_________