Windows Vista ‘WER’ Report Queue Folder can become huge on Vista computers. “WER” is Windows Error Reporting and took more than 1 GB of disk space on my PC recently. I discovered that by accident when reviewing the list of fragmented files and found many 20 MB files with 300 fragments or more.
What to do about it: You can clear that through Vista’s “Disk Cleanup” (right click the drive icon in Explorer and select “Properties” and then “Tools”. This gave me back 15 GB of diskspace on my system drive.
Definitely worth checking from time to time if you have apps that crash a lot and use Windows Vista. Software developers and testers will likely have this situation!
WER can be turned off in the “Problem Reports and Solutions” applet in Control Panel.
Background Info on Microsoft technet: http://technet2.microsoft.com/WindowsVista/en/library/03a97dba-6b24-42c7-81f0-fb751f6e839d1033.mspx?mfr=true
Hotware: Dirk Paessler's Software Blog 