HELLO , I have an ACER 320 HARD DRIVE, 3G RAM, ASPIRE 4736Z laptop and am ruining windows 7 Enterprise ,Its 4 months old and still having warranty. My system suddenly goes to a black screen and its very slow when i am working ,but the power button remains on which is neither in a sleep mode nor Hibernating mode. Every time it happens I need to restart my computer there by losing my current data.I have been to the service center of ACER they said its the hard drive ,they changed it and put a brand new one .I came back and am still having the same problems including blue screen error. I suggested to them that its the graphic card,base on my research , but they seems to say no its my OS that I should reinstall it it will be OK .I have done it but its still have same problems.Bellow are some informations from the log file.Please help me out here.What should I do?Thanks in advance for your responses am waiting... The system has rebooted without cleanly shutting down first. This error could be caused if the system stopped responding, crashed, or lost power unexpectedly. Critical 1/12/2011 11:36:49 AM Kernel-Power 41 (63) System - Provider [ Name] Microsoft-Windows-Kernel-Power [ Guid] {331C3B3A-2005-44C2-AC5E-77220C37D6B4} EventID 41 Version 2 Level 1 Task 63 Opcode 0 Keywords 0x8000000000000002 - TimeCreated [ SystemTime] 2011-01-12T19:36:49.658814400Z EventRecordID 3961 Correlation - Execution [ ProcessID] 4 [ ThreadID] 8 Channel System Computer CHILLA-PC - Security [ UserID] S-1-5-18 - EventData BugcheckCode 0 BugcheckParameter1 0x0 BugcheckParameter2 0x0 BugcheckParameter3 0x0 BugcheckParameter4 0x0 SleepInProgress true PowerButtonTimestamp 129393345747989917

Hi, check this KB article please: Windows Kernel event ID 41 error in Windows 7 or in Windows Server 2008 R2: “The system has rebooted without cleanly shutting down first” http://support.microsoft.com/kb/2028504 and check all 5 steps under scenario 3."A programmer is just a tool which converts caffeine into code" CLIP- Stellvertreter http://www.winvistaside.de/

I noticed overheating as a possible cause on the KB-article. Maybe your CPU or graphics card are overheating? One other thing to try that I'm sure isn't MS's policy to recommend: See if it helps at all if you use your computer with the chassi open - maybe even with a fan (non-computer fan) directed into it. Good thing I'm an arts student, eh?