Hi,
Try the methods listed in following link to check the issue:
http://support.microsoft.com/kb/2813190?wa=wsignin1.0
Also, if you want to install both 32 bit and 64 bit, then please refer to the following link:
http://office.microsoft.com/en-001/help/why-cant-i-install-both-the-32-bit-and-64-bit-versions-of-office-2013-HA103523746.aspx
Jaynet Zhang
TechNet Community Support
