Intermittently, my PC freezes for a few minutes then it becomes usable again. This issue is infrequent, maybe once or twice a day, but annoying when it does so. In the System Event logs, the error message is: ---------- Log Name: System Source: iaStor Date: 18/11/2012 12:29:32 Event ID: 9 Task Category: None Level: Error Keywords: Classic User: N/A Computer: Black_Widow Description: The device, \Device\Ide\iaStor0, did not respond within the timeout period. Event Xml: <Event xmlns="http://schemas.microsoft.com/win/2004/08/events/event"> <System> <Provider Name="iaStor" /> <EventID Qualifiers="49156">9</EventID> <Level>2</Level> <Task>0</Task> <Keywords>0x80000000000000</Keywords> <TimeCreated SystemTime="2012-11-18T12:29:32.518898100Z" /> <EventRecordID>504316</EventRecordID> <Channel>System</Channel> <Computer>Black_Widow</Computer> <Security /> </System> <EventData> <Data>\Device\Ide\iaStor0</Data> <Binary>0F0028000100000000000000090004C011111111090004C0010000000000000067452301EFCDAB89010000000000CCCC2A00B0CD80032040000000003C000000030000004526C2E80300000091CF42FB</Binary> </EventData> </Event> ------------ When looking this up on the Net, explanations to this error description suggest a an faulty storage device or controller, but how can I tell from this error message (or any other way) which particular device is causing this, or if there is any other cause of this? My system specs: motherboard = Asus P8Z68 Deluxe; CPU = i7-2600K; 16 GB RAM; Operating system = Windows 7 Ultimate 64-bit; system drive = 120GB Corsair Force Series 3; two additional Western Digital hard drives; graphics card = 1536MB MSI GTX 580 Twin FrozR II/OC. Let me know if any other information is needed in order to rectify this. Thanks.