i am using windows xp professional version 2002 service pack 2 with pentium(R) D CPU 2.80GHz and 992MB of RAM. When working in ms office powerpoint etc even in open office while copy pasting some points (in powerpoint) or viewing two or more document alternatively my pc gets restarted.It even restarted while printing.to say exactly it finish printing 2 sheets and while it attempts to print the third sheet it restarted. some of my friends say that this may happens due to virus but i had performed online scan in kaspersky and there is no virus is identified. My system even restarts while browsing for an hour i got the below mentioned error code BCCode : 9c BCP1 : 00000000 BCP2 : F7ABA050 BCP3 : B2000000 BCP4 : 1040080F OSVer : 5_1_2600 SP : 2_0 Product : 256_1 please help me

ponnalagu, a restart pretty much smacks of a redirect to a restart command. Suspect the 'virus' thought was correct, but the semantics were off. Suspect you're fighting a Trojan rather than a virus. Be aware that a virus and a Trojan are similar, but not the same. Many times, an AV detects one it can't clean , other times, it gets missed entirely. If you need to clean one, Superantispyware can do the job and you can get it free @: http://www.superantispyware.com/ among other places. They have a Vista compatible version if needed. If it turns out that you need to use it, be sure to update prior to running and disable 'restore' (restart after cleaning) so it doesn't get put back. They just released a new update recently and it changes all the time. Things are in a constant state of flux. HTH. Ed in Texas.

Thank you ed i had downloaded, installed and updated the spyware and had performed a full computer scan.there was no spyware present in my pc according to the scan result. please suggest me for this problem the error code is BCCode : 9c BCP1 : 00000000 BCP2 : F7ABA050 BCP3 : B2000000 BCP4 : 1040080F OSVer : 5_1_2600 SP : 2_0 Product : 256_1 i am very much suffering due to this unusual system restart my pc details: Manufacturer: Hcl infosystems limited Model: P4M800PRO-M OS: Microsoft Windows XP Professional CPU/Ram: 2.794 GHz / 991 MB Video Card: VIA/S3G UniChrome Pro IGP Sound Card: Realtek AC'97 Audio for VIA (R) Audio Controller Antivirus :Avast version 4.8 professional

hi not an answer as such but id suggest you update your Avg, version 8 is the most current (free version available). http://free.avg.com/ the error code is possibly a hardware error maybe a memory issue heres a link to memory testing software http://www.memtest86.com/ if you dont know how to do this, get someone who can for you.