Curious if anyone else has ran into this as well. So far Win7 RC1 has been running great for me but just earlier I noticed my computer shut itself off randomly. Then turned back on about 10 minutes later. I remember vista had similar issues with putting computers into sleep mode at first. Here are my stats (produced with a 3rd party auditing tool): Computer: Operating System Windows 7 Ultimate Professional OS Service Pack - Internet Explorer 8.0.7100.0 DirectX 4.09.00.0904 (DirectX 9.0) **Obviously this is not correct** Computer Name BLACKBOX User Name Monolith Motherboard: CPU Type Unknown, 2400 MHz (7 x 343) Motherboard Name Unknown Motherboard Chipset Unknown System Memory 3072 MB BIOS Type AMI (06/26/07) Communication Port Communications Port (COM1) Display: Video Adapter NVIDIA GeForce 8800 GTS Video Adapter NVIDIA GeForce 8800 GTS Monitor Dell 3007WFP [NoDB] (YW25877IGAEF) Multimedia: Audio Adapter Creative SB X-Fi [NoDB] Storage: IDE Controller Standard Dual Channel PCI IDE Controller IDE Controller Standard Dual Channel PCI IDE Controller IDE Controller Standard Dual Channel PCI IDE Controller Floppy Drive Floppy disk drive Disk Drive Generic Flash HS-CF USB Device Disk Drive ST3500630AS ATA Device (465 GB, IDE) Disk Drive ST3500630AS ATA Device (465 GB, IDE) Disk Drive Canon MP Memory Card USB Device Disk Drive Generic Flash HS-COMBO USB Device Optical Drive HL-DT-ST DVD-RAM GSA-H55L ATA Device SMART Hard Disks Status OK Partitions: C: (NTFS) 476937 MB (459869 MB free) D: (NTFS) 476937 MB (210806 MB free) Input: Keyboard Standard PS/2 Keyboard Mouse HID-compliant mouse Network: Network Adapter Marvell Yukon 88E8056 PCI-E Gigabit Ethernet Controller Network Adapter Realtek RTL8169/8110 Family PCI Gigabit Ethernet NIC (NDIS 6.20) (192.168.2.13) Network Adapter Realtek RTL8187 Wireless 802.11b/g 54Mbps USB 2.0 Network Adapter Peripherals: Printer Canon Inkjet MP700 Printer Fax Printer Microsoft XPS Document Writer USB1 Controller Intel(R) ICH9 Family USB Universal Host Controller - 2934 [NoDB] USB1 Controller Intel(R) ICH9 Family USB Universal Host Controller - 2935 [NoDB] USB1 Controller Intel(R) ICH9 Family USB Universal Host Controller - 2936 [NoDB] USB1 Controller Intel(R) ICH9 Family USB Universal Host Controller - 2937 [NoDB] USB1 Controller Intel(R) ICH9 Family USB Universal Host Controller - 2938 [NoDB] USB1 Controller Intel(R) ICH9 Family USB Universal Host Controller - 2939 [NoDB] USB2 Controller Intel(R) ICH9 Family USB2 Enhanced Host Controller - 293A [NoDB] USB2 Controller Intel(R) ICH9 Family USB2 Enhanced Host Controller - 293C [NoDB] USB Device Canon Inkjet MP700 USB Device Generic USB Hub USB Device Generic USB Hub USB Device Realtek RTL8187 Wireless 802.11b/g 54Mbps USB 2.0 Network Adapter USB Device USB Composite Device USB Device USB Composite Device USB Device USB Input Device USB Device USB Input Device USB Device USB Mass Storage Device USB Device USB Mass Storage Device USB Device USB Printing Support

Locut0s - There's nothing specific in the hardware that jumps out and screams "problem!"Your 3rd party auditing tool - probably could use an update to it's database, however, given it can't identify DirectX nor the CPU. Guessing you've got an Intel chip based on that you've got an Intel USB controller. Either way, the first thing I would do is check the sleep settings for your computer. There are a number of known issues with hibernation and sleep with Windows 7. The programmers are working on it and with any luck will have it fixed. In the mean time, it might be best to simply disable it entirely until then.

Yes it seems to be a problem with sleep/hibernation. Vista had similar problems and I simply turned it off there and never looked back. I've done so for Win7 and everything seems fine now. Thanks.

I too have had this happen with both Vista and now Windows 7. It does not happen often or any specific time or event that I can identify. It has occurred when when I was on the web with IE 8 and when I was using Office Home 97 Word. Again not very often but it does happen. I'm 66 with just basic skills so I just like things to work without "issues" System: CPU Intel- I 7 - 920 Ram 9 GB Video ATI Radeon HD 4850 HD #C: Vista Home Premiun 64 bit 750 GB, #L: Windows 7 Ultimate 64 bit 1TB, #J: Backups Vista & "7" 1TB Opt Drives #D:Std DVD/CD #E:Combo Blu/HD LG burner

Yes I have the same problem and this what the shutdown log looks like: Event[11]: Log Name: System Source: USER32 Date: 2009-05-28T17:18:33.000 Event ID: 1074 Task: N/A Level: Information Opcode: N/A Keyword: Classic User: S-1-5-21-844243766-919101756-2676928134-1001 User Name: Siivu-PC\Siivu Computer: Siivu-PC Description: The process C:\Windows\system32\winlogon.exe (SIIVU-PC) has initiated the restart of computer SIIVU-PC on behalf of user Siivu-PC\Siivu for the following reason: No title for this reason could be found Reason Code: 0x500ff Shutdown Type: restart Comment: Event[12]: Log Name: System Source: USER32 Date: 2009-05-28T17:47:23.000 Event ID: 1074 Task: N/A Level: Information Opcode: N/A Keyword: Classic User: S-1-5-21-844243766-919101756-2676928134-1001 User Name: Siivu-PC\Siivu Computer: Siivu-PC Description: The process Explorer.EXE has initiated the restart of computer SIIVU-PC on behalf of user Siivu-PC\Siivu for the following reason: Other (Unplanned) Reason Code: 0x0 Shutdown Type: restart Comment: Event[13]: Log Name: System Source: USER32 Date: 2009-05-28T17:47:27.000 Event ID: 1074 Task: N/A Level: Information Opcode: N/A Keyword: Classic User: S-1-5-21-844243766-919101756-2676928134-1001 User Name: Siivu-PC\Siivu Computer: Siivu-PC Description: The process C:\Windows\system32\winlogon.exe (SIIVU-PC) has initiated the restart of computer SIIVU-PC on behalf of user Siivu-PC\Siivu for the following reason: No title for this reason could be found Reason Code: 0x500ff Shutdown Type: restart Comment: Event[14]: Log Name: System Source: USER32 Date: 2009-05-28T18:03:48.000 Event ID: 1074 Task: N/A Level: Information Opcode: N/A Keyword: Classic User: S-1-5-21-844243766-919101756-2676928134-1001 User Name: Siivu-PC\Siivu Computer: Siivu-PC Description: The process Explorer.EXE has initiated the restart of computer SIIVU-PC on behalf of user Siivu-PC\Siivu for the following reason: Other (Unplanned) Reason Code: 0x0 Shutdown Type: restart Comment: Event[15]: Log Name: System Source: USER32 Date: 2009-05-28T18:03:52.000 Event ID: 1074 Task: N/A Level: Information Opcode: N/A Keyword: Classic User: S-1-5-21-844243766-919101756-2676928134-1001 User Name: Siivu-PC\Siivu Computer: Siivu-PC Description: The process C:\Windows\system32\winlogon.exe (SIIVU-PC) has initiated the restart of computer SIIVU-PC on behalf of user Siivu-PC\Siivu for the following reason: No title for this reason could be found Reason Code: 0x500ff Shutdown Type: restart Comment: Iguess i have to turn off the hibernation also.

I've got this same issue on my Dell Optiplex GX620. I'll try and disable hibernation, see if that works...

Ok i am simple mother trying to fix my son's computer, which too seems to be a random without reason shutdown. Where do i find the hibernation function to shut it down. Thanks in advance, Ameme

Normally, I can usually figure out causes to issues like this. I really believed it had to do with Windows 7 but was able to recreate the same issue after installing XP. My machine would just randomly reboot itself when I was right in the middle of normal tasks, such as surfing the internet. Sometimes right before it'd reboot and while it was booting up, I'd have multi-colored scrambled code show up on my screen while it was booting up so I'd have to shut it down and restart it manually. Event Viewer would state: Critical error, Kernel-Power, event Id: 41. I thought about the possible causes over the course of a few months or so and couldn't figure out the cause, even after reinstalling Windows going from 7 to XP and replacing the thermal paste on my CPU. As far as I could tell, my machine didn't have any overheating issues. Because of this, I thought it might be something wrong with my motherboard. It really seemed like an overheating issue to me, so I took off my heatsink again to make another attempt at replacing the thermal paste. My heatsink covers my video chip with a thermal pad in between. I replaced the thermal pad with Arctic Silver 5 thermal paste and it resolved the issue completely. I haven't had another random reboot since and it's been about a month now and the random reboots used to happen multiple times every day. It appears my video chip was overheating using the thermal pad installed by the manufacturer.