Thanks, I tried to reinstall, and this is what hapened:
1. I downloaded tc-install and executed it, but it told me to umount the hdd first.( and I closed the window)
2. umount wouldn't umount the drive since it's busy, won't work with force as well, but it did work with -l
3. tc-install wouldn't open though it appeared on the wbar.
4. I rebooted, opened tc-install, unmounted sda1 with -l, then proceeded installing with tc-install choosing "whole drive" and formatting to ext4.
5. Now everything works from the hdd, and both my home directory and all the extensions I downloaded including tc-install are still on the disk.
Wasn't the hdd supposed to be formatted?