My system kept shutting down and would not give me an error message. A webpage would come up and is would say it was a Windows Stop Error but it could not be identified and sometime it would indicate it was a driver that could not be identified. I called Toshiba and was told to reload my operating system with their recovery CD. I tried this and found out that due to Hard drive encryption my drive would not reformat. So, I purchased a new 120 gig HD. I loaded the recovery cd and started updating XP. Then it shut down again during one of the updates. This was the codes I got: BCCode: 10000050 BCP1: FF2B1C60 BCP2: 00000000 BCP3: 804F553A BCP4: 00000000 OSVer: 5_1_2600 SP: 2_0 Product: 265_1 I will attache the files it created to send to Microsoft. Then, after the reboot, I used it a little while and was updating to IE7 and I got a message that the computer was going to shut down in 60 seconds and the cause was a NTAuthority/System in the Windows\System32 and it was file lsass.exe and there was a code of -2147483641. I read on the forum and saw it might be a virus so I rebooted and did a virus scan on boot-up. Nothing was found. I have updated the operating system, I have replaced the hard drive, I have been given bad information from Toshiba and I need some help!! Can someone please tell me what is going on with this laptop. It is my only computer and I desperatly need it for work.