Hi all, im new and hope you can help. I have recently upgraded from Vista to Windows 7, via a free upgrade i got when i bought my pc. My pc is about 4 months old and i have been running W7 great for 3 weeks. My problem came about last week when suddenly my computer crashed to a black screen saying, BOOTMGR IMAGE CORRUPT, this black screen would not reset and i had to re power at the wall. I managed to run in safe mode and rad disk checks etc with no problems being found. I ther restarted with no problems. Within an hour it crashed again, to another black screen saying, FILE IS POSSIBLY CORRUPT, FILE HEADER CHECKSUM DOES NOT MATCH THE COMPUTED CHECKSUM. I did the same as above again and restarted eventually. THis time it crashed to a blue screen, and keeps on doing without warning. It is driving me mad. Can anyone help, i rang the pd manufacturer help line who went through it with me only to then say i had to ring their Ã‚Â£1 a min phone line (premium rate). I am not great with pc's so i will not be able to do anything complex. help thanks mk just to add, at the time i was just on the web. no cd or dvd in the drive, no usb storage or anything was attached.