Hi Hope someone can help me. I'm running: Windows XP Home Edition Service Pack 3 OS version 5.1 (2600) RAM: 1.99 CPU Intel Celeron 3.06 Problem started when I plugged in a USB stick. Whilst watching a film from the stick the screen went blue, saying that there was either a recently installed software problem that should be uninstalled or a driver issue. It then ended with a physical dump error message. Naturally I blamed the USB stick but just took it out - I'm not sure where to locate the files that enable that hardware to have been used in order to uninstall it. Suffice to say I don't have the stick (it wasn't mine) anymore. Then I uninstalled software for a bluetooth dongle and the problem seemed to go away, but after a couple of months it's come back again. I have to say that the error messages have not always been identical but the last one said this; BCCode : 19 BCP1 : 00000020 BCP2 : E17D2910 BCP3 : E17D2940 BCP4 : 0C060208 OSVer : 5_1_2600 SP : 3_0 Product : 768_1 I was advised to start in safe mode, but it goes straight to a blue screen and tells me to run CHKDSK /F. I have done this on a few occasions (sometimes it automatically runs on restart after the blue screen crash) and on one of the scans I noticed it said NTFS system is dirty. But the latest CHKDSK doesn't say that. Also, the blue screen seems to happen whilst looking at web pages and sometimes the screen will go blank and a second later back to normal again - the same happens prior to a blue screen, a blank screen for a second. Any help much appreciated as this is starting to be very disruptive.