Hi My PC keeps crashing in the early hours of the morning. I don't think I've installed new software. I've rolled back to an older state without any effect. The 'Problem Details' are: Problem signature: Problem Event Name: BlueScreen OS Version: 6.1.7600.2.0.0.256.1 Locale ID: 3081 Additional information about the problem: BCCode: 1 BCP1: 0000000077BE021A BCP2: 0000000000000000 BCP3: 0000000000000048 BCP4: FFFFF88008D20CA0 OS Version: 6_1_7600 Service Pack: 0_0 Product: 256_1 My PC is and AMD with 8GB RAM. Any advice welcome. Thanks

Bug Check Code 0x1: The APC_INDEX_MISMATCH bug check has a value of 0x00000001. This indicates that there has been a mismatch in the APC state index. For more information, refer to this Microsoft article. I recommand to you to update all your drivers and to check if this solve your problem. If this does not help, please upload the zipped dump files(C:\Windows\memory.dmp) using skydrive and post the link here. This posting is provided "AS IS" with no warranties or guarantees , and confers no rights. Microsoft Student Partner Microsoft Certified Professional Microsoft Certified Systems Administrator: Security Microsoft Certified Systems Engineer: Security Microsoft Certified Technology Specialist: Windows Server 2008 Active Directory, Configuration Microsoft Certified Technology Specialist: Windows Server 2008 Network Infrastructure, Configuration

Hi Mr X Thanks for the advice. I've started with uninstalling my Webcam (I don't use it much anyway) and will slowly work through the system until either it stops crashing or I run out of drivers to update. I'll post back in a week or so with my progress. hozozco.

Well, it's been a week with no crashes so it appears fixed. The Logitech web cam driver appears to have been the culprit. Many thanks Mr X. hozozco