My daughters HP keeps restarting after each bootup. If I instruct windows to boot in debug mode and unplug the network connection the PC will boot properly and post a Critical Windows error and ask to send or don't send the report. I can click don't send and the pc will function normally until I plug the network cable in, then within a minute the pc will restart. Just be fore the restart, Norton AV will show a virus detected. If I unplug the network cable and reboot in debug mode I can veiw the Virus history and it will show the virus detected at the same time the restart happened. The virus is usuallly the Trojan.srizbi or Hacktool.spammer. In each case Norton says the viruses were cleaned or quarentined. I have updated the virus defs by using my other PC to download the defs and copy them in on a flash drive. Have run a full system scan and nothing is found. I would suspect the PC but it is fine until the network is connected.

UM

download and install
spybot serach & destroy 1.5 (NEW)
http://www.safer-networking.org/en/...

AVG Free - if you have a AV - remove it before you install this
http://free.grisoft.com/

AVG Anti spyware
http://free.grisoft.com/doc/29116/u...

AVG Anti rootkit
http://free.grisoft.com/doc/29116/u...

Lavasoft adaware 2007 free
http://www.lavasoftusa.com/products...

CW Shredder standalone
http://www.intermute.com/spysubtrac...

ATF Cleaner
http://www.majorgeeks.com/ATF_Clean...

run the updates for all of these programs, then go into safe mode and run them one by one not all at the same time. If you have another Anti virus tool then remove that before installing AVG free.

Also go to Start >> Run type: msconfig
look at all the enterys under the STARTUP tab and carefully deselect those you believe are Malicious, if you are unsure type them on here and we can instruct weather to remove or not.

do this and then come back with results.