We use all Microsoft technologies for our system.
- NLB clustered Windows Server 2008 R2 (IIS 7.5)
- PHP 5.2.13 (FastCGI)
- SQL 2008 Failover Cluster
- MSSQL PHP Driver (not FreeTDS)
There was no error messages at all, and the windows would stay in exactly the same position for days if you left it. To cancel press CTRL+C.