My 64-bit Vista became slow a few days ago. The system event log is full of this error, about every 2.5 minutes:
Much googling made me do the following:
1. Install the latest iastor.sys (AHCI) from intel. (December 2010, V10.1.0.1008)
2. Disable the iastor.sys parameters in the registry as per this http://www.paulscomputerservice.net/articles/article.php?ID=97
3. Test the hard drive using a SMART diagnostic tool, got all "OK":
4. Install Intel Rapid Storage Technology GUI, and check the diagnostics.
There are no iastor parameters in the registry (renamed to parameters.bad as per http://www.paulscomputerservice.net/articles/article.php?ID=97
SOOO, any ideas why \Device\IDE\iaStor0 continues to throw EventID 9 timeout errors?