Super User is a question and answer site for computer enthusiasts and power users. It's 100% free, no registration required.

Sign up
Here's how it works:
  1. Anybody can ask a question
  2. Anybody can answer
  3. The best answers are voted up and rise to the top

Just recently I've been unable to install any software on my Windows 7 machine. Anything that uses InstallShield or the Windows installer will just hang or give a weird error.

I noticed there will be many duplicate isbew64.exe processes (like 25) that launch and then just sit there or else a lot of msiexec.exe *32 processes, depending on what I'm trying to install.

One piece of software specifically is the Logitech Harmony software. It gives me an *is_string_not_defined* error, saying c:\program files (x86)\:\ the filename, directory name, or volume label syntax is incorrect.

The other thing I was trying to install was Battlefield: Bad Company 2, and that just hangs as well, and then just leaves all the Windows installer processes running in the background after I quit the install process. Very odd.

I've checked well and googled these issues, it doesn't appear to be any sort of malware issue. I feel like it's related to some kind of corrupted installer application.

I've rebooted, deleted the InstallShield folder in program files/common files as some places online suggested but to no avail.

I have no idea what to do, any ideas?

share|improve this question
Is this Windows 7 64Bit? Do the apps you are trying to install support Windows 7 64Bit? – Dave M Mar 10 '10 at 21:01
Is she getting the uac prompt? – user33451 Apr 6 '10 at 23:11
yeah, i know for the harmony software is supported, as i had it installed before. – Bobby S Apr 14 '10 at 4:50
no uac prompt comes up – Bobby S Apr 14 '10 at 4:51
I have the same issue on a brand new sony vaio with windows 7 proffessional. All installations hangs with one core fully occupied until I kill it... – jishi Jul 21 '10 at 22:44

Try typing msiexec /unregister then msiexec /regserver in an elevated command prompt.

share|improve this answer

Your Answer


By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.