Hey guys, I've had this weird problem for a while with Boot Camp and Windows 7. My computer has trouble booting. I can boot if I hold down ALT and selecting the OS, sometimes it needs a CD in the DVD drive (weird, huh) When I turn on my Mac, the grey screen with the apple logo stays fully grey for a LONG time before the apple logo appears During this time, the hard drive makes a lot of read noises, making me believe there is an issue with the MBR/GPT or something similar This problem had occurred for a long time, but then I made matters even worse by attempting to shrink my Mac partition and create a 3rd partition in between the two, screwing up the MBR and boot tables. I was able to get around this problem with rEFIt and a lot of hassle To fix this problem, I deleted my windows/storage partition I then made the Mac partition smaller and redid the whole boot camp process, this time with a larger boot camp partition The LONG boot times are still there, but I no longer have to go through rEFIt However, PROBLEM 1: OS X cannot see my boot camp partition at all (suggesting something wrong with mbr/gpt/etc) I have since, in an attempt to fix this, done a clean install of OS X Mountain Lion by reformatting my OS X partition. I still (PROBLEM 2) have long boot problems, and now Mountain Lion can't see Windows 7 and I can't boot to it. Going to attempt to delete the recovery partition to see if that helps. Below I have included terminal output for the sudo gpt -r -vv show disk0 commands and the sudo fdisk /dev/disk0 commands I have been at my wits end about this and it's driving me crazy! Very tempted to sell this iMac and just go back to windows computers. Code: rais-imac:~ Rai$ sudo gpt -r -vv show disk0 Password: gpt show: disk0: mediasize=1000204886016; sectorsize=512; blocks=1953525168 gpt show: disk0: Suspicious MBR at sector 0 gpt show: disk0: Pri GPT at sector 1 gpt show: disk0: Sec GPT at sector 1953525167 start size index contents 0 1 MBR 1 1 Pri GPT header 2 32 Pri GPT table 34 6 40 409600 1 GPT part - C12A7328-F81F-11D2-BA4B-00A0C93EC93B 409640 821258416 2 GPT part - 48465300-0000-11AA-AA11-00306543ECAC 821668056 1269544 3 GPT part - 426F6F74-0000-11AA-AA11-00306543ECAC 822937600 1130586112 4 GPT part - EBD0A0A2-B9E5-4433-87C0-68B6B72699C7 1953523712 1423 1953525135 32 Sec GPT table 1953525167 1 Sec GPT header rais-imac:~ Rai$ sudo fdisk /dev/disk0 Disk: /dev/disk0 geometry: 121601/255/63 [1953525168 sectors] Signature: 0xAA55 Starting Ending #: id cyl hd sec - cyl hd sec [ start - size] ------------------------------------------------------------------------ 1: EE 1023 254 63 - 1023 254 63 [ 1 - 409639] <Unknown ID> 2: AF 1023 254 63 - 1023 254 63 [ 409640 - 821258416] HFS+ 3: AB 1023 254 63 - 1023 254 63 [ 821668056 - 1269544] Darwin Boot 4: 0C 1023 254 63 - 1023 254 63 [ 822937600 - 1130586112] Win95 FAT32L I would be eternally grateful to anyone who could lend a hand. I've tried googling for so long now.