I started on Ubuntu and have had the first considerable error. I have an HP Pavilion DV6 Core i7. I had installed Windows 7 and I decided to also install Ubuntu using USB.
My first attempt was to install Ubuntu 11.10 following the instructions of the official Ubuntu website. When loading the pendrive, my PC got stuck at the main menu of Ubuntu, so after searching, I found that could be due to a problem with my AMD Radeon graphics card (or not), but I decided to change.
Then I used Ubuntu 10.4. This could happen from the start menu I use to get into Ubuntu live. There I decided to install it because I liked it and I need to develop with Google TV (in Windows that's not possible).
And I fail in the partitions section. I tried to follow the instructions on this page (Spanish).
There were things that changed a bit, so I improvised. I took the Windows partition of 700000MB and went to 600000MB, leaving 100GB free to install Linux there. The error was to set it to ext3 (it was ntfs). I thought the new 100gb partition will be set to ext3, and windows partition will stuck at ntfs system, but not.
Total I ran out to boot Windows, and above I can not install Ubuntu on the 100GB free.
Is there any easy way to convert back to NTFS Windows and not lose data?