Adobe Flash Player Could Not Be Installed

Question

OS 10.9.3
iMac 27-inch, Late 2009
AdobeFlashPlayerInstaller_14au_ltrosxd_aaa_aih.dmg
Install Adobe Flash Player Version 2.0.2.7
Safari Version 7.0.3
Hi:
I keep getting the above error when attempting the installation. I used the uninstall program from Adobe, but when I try to reinstall the same error occurs.
I've also twice done the clean install that has worked the last two times I need to upgrade flash at http://forums.adobe.com/thread/1267823 to no avail.
Any advice appreciated!
Thank you!
PS If anyone has any contacts with Adobe, it would be super if they could ask them to remedy this update problem once and for all. On this particular iMac every single time I try to update I waste an hour or two doing clean installs (which have previously worked, but not this time), a less than productive use of time. Our department IT folks say that we must upgrade because of all of the security flaws in Flash, so we don't have the option of staying with the older tried and true working versions

Answer 1

Sorry about the delay in getting back to you; just very busy. Here are the log files from my last attempt:
2014-06-14 14:38:37 -0600 [I]  IM: ---------- log start ----------
2014-06-14 14:38:37 -0600 [I]  IM: All install checks pass
2014-06-14 14:38:37 -0600 [W]  IM: Unexpected umask value for process: 0
2014-06-14 14:38:37 -0600 [I]  IM: User does not have any processes that need to be closed.
2014-06-14 14:38:37 -0600 [I]  IM: [install started]
2014-06-14 14:38:38 -0600 [E]  RA: Unable to launch FPInstallHelper. Error = 'launch path not accessible'
2014-06-14 14:38:38 -0600 [E]  RA:
Attributes for '/var/folders/zz/zyxvpxvq6csfxvn_n0000000000000/T/FPInstallHelper':
    NSFileCreationDate = "2014-05-28 19:39:15 +0000";
    NSFileExtensionHidden = 0;
    NSFileGroupOwnerAccountID = 0;
    NSFileGroupOwnerAccountName = wheel;
    NSFileHFSCreatorCode = 0;
    NSFileHFSTypeCode = 0;
    NSFileModificationDate = "2014-05-28 19:39:15 +0000";
    NSFileOwnerAccountID = 0;
    NSFileOwnerAccountName = root;
    NSFilePosixPermissions = 2541;
    NSFileReferenceCount = 1;
    NSFileSize = 13348;
    NSFileSystemFileNumber = 13501584;
    NSFileSystemNumber = 16777218;
    NSFileType = NSFileTypeRegular;
2014-06-14 14:38:38 -0600 [E]  RA:
Attributes for '/var/folders/zz/zyxvpxvq6csfxvn_n0000000000000/T':
    NSFileCreationDate = "2014-06-14 19:59:41 +0000";
    NSFileExtensionHidden = 0;
    NSFileGroupOwnerAccountID = 0;
    NSFileGroupOwnerAccountName = wheel;
    NSFileModificationDate = "2014-06-14 20:38:37 +0000";
    NSFileOwnerAccountID = 0;
    NSFileOwnerAccountName = root;
    NSFilePosixPermissions = 449;
    NSFileReferenceCount = 9;
    NSFileSize = 306;
    NSFileSystemFileNumber = 13500656;
    NSFileSystemNumber = 16777218;
    NSFileType = NSFileTypeDirectory;
2014-06-14 14:38:38 -0600 [E]  IM: [install failed: 30]
2014-06-14 14:38:38 -0600 [E]  IM: Install failed with error code: 30.
2014-06-14 14:38:38 -0600 [I]  IM: ----------  log end  ----------
Thank you very much for your attempts to trouble shoot this!