Basically a similar issue as the above post. Version 1.8 fails to install with the standalone installer; with OSGeo4w, while it doesn't run into trouble during the installation, ultimately fails as well (same error message as below when opening the app).
Standalone installer has the following problems:
At the end of the installation, it reaches "qgis-common.bat" execution and stalls; meanwhile, Task Manager shows "find string" GREP utility running in the background and repeatedly crashing every minute or so. Ending the process results it immediately starting back up.
If the installation is forced to quit or completed, trying to open Qgis results in the error message that qwt5.dll is missing.
QGREP crash signature:
Problem Event Name:APPCRASH Application Name: findstr.exe Application Version: 6.1.7601.17514 Application Timestamp: 4ce78c0a Fault Module Name: findstr.exe Fault Module Version: 6.1.7601.17514 Fault Module Timestamp: 4ce78c0a Exception Code: c0000005 Exception Offset: 00003c76 OS Version: 6.1.7601.2.1.0.768.3 Locale ID: 1033 Additional Information 1: 0a9e Additional Information 2: 0a9e372d3b4ad19135b953a78882e789 Additional Information 3: 0a9e Additional Information 4: 0a9e372d3b4ad19135b953a78882e789