data1.cab is a file which the Windows Installer creates in a temporary directory that is defined in your system’s "Environmental Variables". To see which directory your system is expecting to you right click on "My Computer" and select "Properties". Then click on the "Advanced" tab and select "Environmental Variables". You should see a list including the expected paths for your "Temp" and "Tmp" folders. Normally these are something like "C:\Windows\Temp" or something similar.
If by chance you have deleted the "Temp" folders from your system the installer will not be able to locate the folder and you’ll get this message. Some disk cleanup utilities will delete these folders if you allow them. Also, if you’re installing SureSync while not logged into the machine as the Administrator account this problem can occur.
If the environmental variables are correct and the temp folders exist then there are some other things you can try which are outlined in a knowledge base article from InstallShield which is available at http://support.installshield.com/kb/view.asp?pcode=WIN200PEE&articleid=Q105435.
- Go into the temp folders and delete as much as you possibly can. Then try running the installer again.
- This can also be caused by not having enough free space on the drive where your temp directories are located. There should be at least double the size of the installer in free space available to avoid any problems. If there is not you can try deleting some files to make room and then running the installer again.
- It could also be that the installation file you downloaded was corrupted during the download process. You can try deleting your Internet browser cache file and then downloading the file again. Then run the installation again and see if the problem goes away. You can also try using a download manager tool to ensure that the file gets downloaded properly.