Hi eveyone. I have a Toshiba laptop that came pre-installed with Win 7. I have installed 3 Linux distros on same hard drive (the only hard drive). I would like advice on deleting Win 7 without messing-up my Linux distros. Attahed is a copy of 'blkid':

/dev/sda1: LABEL="System" UUID="2034EB9834EB6EEA" TYPE="ntfs"
/dev/sda2: LABEL="TI106303W0D" UUID="002211C92211C516" TYPE="ntfs"
/dev/sda3: LABEL="HDDRECOVERY" UUID="4C2E385F2E3843EC" TYPE="ntfs"
/dev/sda5: UUID="eb7c6b06-f342-4a13-affe-c29e17d2edc1" TYPE="ext4"
/dev/sda6: UUID="ef8d02b2-7d4a-40dc-92ad-5151d83b0ce6" TYPE="ext4"
/dev/sda7: LABEL="Mint /home" UUID="e6205dfb-e0c4-4e1f-ba6e-78313d9833fc" TYPE="ext4"
/dev/sda8: UUID="ec7d71e0-e75d-42b7-a455-db4671da402f" TYPE="swap"
/dev/sda9: UUID="df2bd12f-23e0-429d-a8bb-c39c7d18910b" TYPE="ext4"
/dev/sda10: UUID="db4f2c2f-2b77-42f3-b988-15542c85e94b" TYPE="ext4"
/dev/sda11: LABEL="Fedora 19" UUID="b1582d24-2831-4b01-acad-064726443409" TYPE="ext4"
/dev/sda12: UUID="23958455-0855-4890-92b0-f0c23bb2353e" TYPE="ext4"

Any help will be appreciated.

Back up your data. Then just use gparted to remove the partitions for Windows and re-allocate them for use with Linux. Then run update-grub as root to remove the Windows option from GRUB -- assuming you use GRUB.

While 273's advice is solid, instead of just removing those partitions I recommend to make a backup of those partitions before, especially the one labelled "HDDRECOVERY", just in case at one time you have to restore Windows on that machine.
Of course, this is only needed if you don't have a physical install medium for Windows.

I agree completely. Thank you for being more careful.

Hmmm - the last time I used Toshibas "recover Windows" option, it formatted the entire disk and rebuilt Windows using the entire disk. Wasted all my Linux's. I was very unhappy (yes, I had backups). Was the last Toshiba I ever bought.
Enough of the rant - I find a better option is to boot Windows and use it to make a system image. Then scrub all the Windows partitions.

I suspect that that was a Windows thing, not a Toshiba thing. Windows "restore" disks do the same thing--put the whole drive back to factory default.

If I decide to blow away Windows on my dual-boot machine, I'll back up any important data (really, there isn't any on that machine, but that's because of how I use it), reformat the partitions to ext[something] and add them to /etc/fstab on the Linux side of the house.

Today I rebooted into Windows because I plan to do my (USA income) taxes next week. It has been over a month since I booted into Windows. An hour and a half of updates and three reboots later, I was able to use it . . . .

It has always been my understanding/experience that was what the recovery option in windows would do. Set to factory defaults. I would expect you would lose data on the windows partition also when this is done but don't really know as it's been too long.

Yes you lose everything on Windows too.

That's the point of the recovery partition, it restores the machine back to factory settings. It has nothing at all to do with Toshiba.