1. I press the power Button, I saw the black screen is changed to ash color, No wellcome screen apperes. Then: if I press the restart button it becomes black.If I Press the power button it turns off. I press the power button again PC turns ON normally. It happens since 2 weeks. Not every time but maximum times. Some times it turns on naturally.2. Since the 1st installtion of XP (arround 8 months) I use XP SP 3. (In July 2009, I use windows 7 RC forsome days). I had to boot my XP set up in severel time for virus problem. I use norton, Macafee, avast. Now I use microsoft security essentials (Working Fine). Every times in every installetion "when windows starts I receved an error message (Your computer might be at risk, antivirus software is turned off). also I saw antivirus icon in taskbar becomes red with cross sign. after that it becomes green color, message in taskbar also disapper.3. Recently my pc becomes slow, I also use Norton security scan to search virus, it shows system is clean. So there is no virus I think.4.Some times PC becomes Hang (all most everyday) when I close any windows bar i.e, any folder or IE8. Not totally hang. If I click start button it does not work. If any download running, it continues. I call taskmanager, It comes but did not able to run any new task.Then I click shut down on task manager, then log off. It log off, Then I click my user name in wellcome screen. PC turns ON.(I update my bios setup,Lan Driver, Audio and Video driver,yesterday through Intel website. Windows update is turned ON and updates regularly)#My computer/System Properties/Computer:Intel core 2 Duo CPU E7300 @ 2.66Ghz 2.65Ghz, 1.99GB of RAMDesktop Board: DG35ECOS Name:Microsoft Windows XP ProfessionalVersion:5.1.2600 Service Pack 3 Build 2600Processor:x86 Family 6 Model 23 Stepping 6 GenuineIntel ~2653 Mhz BIOS Version/Date:Intel Corp. ECG3510M.86A.0117.2009.0731.1421, 7/31/2009SMBIOS Version:2.4Hardware Abstraction Layer:Version = "5.1.2600.5512 (xpsp.080413-2111)"Total Physical Memory:2,048.00 MBAvailable Physical Memory:1.32 GBTotal Virtual Memory:2.00 GBAvailable Virtual Memory:1.96 GBPage File Space:4.82 GBPage File:D:\pagefile.sysHard Disk: 320GB (C Drive 50 GB) (also each drives are arround 50 GB)1 person needs an answerI do too

1. I press the power Button, I saw the black screen is changed to ash color, No wellcome screen apperes. Then: if I press the restart button it becomes black.If I Press the power button it turns off. I press the power button again PC turns ON normally. It happens since 2 weeks. Not every time but maximum times. Some times it turns on naturally.2. Since the 1st installtion of XP (arround 8 months) I use XP SP 3. (In July 2009, I use windows 7 RC forsome days). I had to boot my XP set up in severel time for virus problem. I use norton, Macafee, avast. Now I use microsoft security essentials (Working Fine). Every times in every installetion "when windows starts I receved an error message (Your computer might be at risk, antivirus software is turned off). also I saw antivirus icon in taskbar becomes red with cross sign. after that it becomes green color, message in taskbar also disapper.3. Recently my pc becomes slow, I also use Norton security scan to search virus, it shows system is clean. So there is no virus I think.4.Some times PC becomes Hang (all most everyday) when I close any windows bar i.e, any folder or IE8. Not totally hang. If I click start button it does not work. If any download running, it continues. I call taskmanager, It comes but did not able to run any new task.Then I click shut down on task manager, then log off. It log off, Then I click my user name in wellcome screen. PC turns ON.(I update my bios setup,Lan Driver, Audio and Video driver,yesterday through Intel website. Windows update is turned ON and updates regularly)#My computer/System Properties/Computer:Intel core 2 Duo CPU E7300 @ 2.66Ghz 2.65Ghz, 1.99GB of RAMDesktop Board: DG35ECOS Name:Microsoft Windows XP ProfessionalVersion:5.1.2600 Service Pack 3 Build 2600Processor:x86 Family 6 Model 23 Stepping 6 GenuineIntel ~2653 Mhz BIOS Version/Date:Intel Corp. ECG3510M.86A.0117.2009.0731.1421, 7/31/2009SMBIOS Version:2.4Hardware Abstraction Layer:Version = "5.1.2600.5512 (xpsp.080413-2111)"Total Physical Memory:2,048.00 MBAvailable Physical Memory:1.32 GBTotal Virtual Memory:2.00 GBAvailable Virtual Memory:1.96 GBPage File Space:4.82 GBPage File:D:\pagefile.sysHard Disk: 320GB (C Drive 50 GB) (also each drives are arround 50 GB) Please somebody give me a solution.