error 9f

About this tag
The error 9f, also known as bug check 0x9F, is a Windows stop error that typically indicates a driver power state failure, often related to USB or battery power management. On WindowsForum.com, users have reported this blue screen error occurring during asynchronous transfers in Usbhub.sys, after fresh Windows 7 installations, or when running laptops on battery power. Common troubleshooting steps include updating drivers, analyzing minidump files, and checking for hardware conflicts. The tag covers discussions about diagnosing and fixing error 9f, with a focus on driver issues and power-related crashes.

  1. FIX: Stop error 0x9F or 0xFE in Usbhub.sys occurs when asynchronous transfer is in progress...

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    • asynchronous transfer driver issues error 0xfe error 9f microsoft support stop error system error troubleshooting usbhub.sys windows issues
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    • Forum: Knowledge Base (KB)

  2. Windows 7 Fresh install win 7 - Crashed 9f error

    I tryeda alot to fix this my self but I can't and would like some one more exp. to debug my Dump file. Link:MEMORY.zip
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    Windows 7 BlueScreen on labtop Battery Power

    I've had my alienware for about a month now. I had a tech from a local computer store install a Crucial 120 Gb SSD and 8gb more of 1600 mhz ddr3 memory. He also did a fresh restall. Ever since that point I haven't been able to run my computer on battery power as 10-15 minutes after i start...
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    Windows 7 Windows 7 64 bit bsod 9f

    So I've done my research about the 9f bsod's but I cant seem to fix my own. Ive checked the obvious drivers and all of them are up to date, so I'm hoping someone can give me a hand. I've attached my minidump files. Windows 7 64bit nvidia 9800 gtx intel 8400 core 2 duo 3.0ghz