Looks like no one’s replied in a while. To start the conversation again, simply ask a new question.

Error 7, Windows Error 126

This application has failed to start because pthreadVC2.dll was not found. Re-installing the application may fix this problem

ITunes was not installed correctly. Please reinstall ITunes.
Error 7(Windows error 126)

Sony Vaio, Windows Vista

Posted on May 19, 2010 5:15 PM

Reply
Question marked as Best reply

Posted on May 19, 2010 5:44 PM

This application has failed to start because pthreadVC2.dll was not found. Re-installing the application may fix this problem


pthreadVC2.dll is an Apple Application Support dll, so in this case the 7 is most likely being caused by a damaged Apple Application Support. (iTunes requires a properly functioning AAS in order to work correctly.)

If you've got a 32-bit version of Vista, try the procedure I describe to Jroth in the following thread:

http://discussions.apple.com/thread.jspa?threadID=2256037

If you've got a 64-bit Vista, try the procedure I describe to fizzylove in the following thread:

http://discussions.apple.com/message.jspa?messageID=10918603#10918603

Note: since posting the fizzylove procedure, the download location for the 64-bit iTunes installer has changed. You can now find it at the following location (at the time that I write this reply, at least):

http://support.apple.com/kb/DL1037
7 replies
Question marked as Best reply

May 19, 2010 5:44 PM in response to NA-2

This application has failed to start because pthreadVC2.dll was not found. Re-installing the application may fix this problem


pthreadVC2.dll is an Apple Application Support dll, so in this case the 7 is most likely being caused by a damaged Apple Application Support. (iTunes requires a properly functioning AAS in order to work correctly.)

If you've got a 32-bit version of Vista, try the procedure I describe to Jroth in the following thread:

http://discussions.apple.com/thread.jspa?threadID=2256037

If you've got a 64-bit Vista, try the procedure I describe to fizzylove in the following thread:

http://discussions.apple.com/message.jspa?messageID=10918603#10918603

Note: since posting the fizzylove procedure, the download location for the 64-bit iTunes installer has changed. You can now find it at the following location (at the time that I write this reply, at least):

http://support.apple.com/kb/DL1037

May 20, 2010 1:13 AM in response to NA-2

The following Microsoft document should help with the 32-bit/64-bit thing:

[32-bit and 64-bit Windows: frequently asked questions|http://windows.microsoft.com/en-US/windows-vista/32-bit-and-64-bit-Wi ndows-frequently-asked-questions]

The iTunes library and content files are stored off in different locations than in Program Files or Program Files (x86), so we won't be touching them when we do the uninstall (following either the Jroth or fizzylove instructions).

Error 7, Windows Error 126

Welcome to Apple Support Community
A forum where Apple customers help each other with their products. Get started with your Apple ID.