I've installed Ubuntu 11.04 on my notebook ASUS U36SD. It worked perfectly fine for 4 months.
Recently, I decided to install the last version of Ubuntu, 11.11. From now, Windows 7 doen't want to boot: It freezes at the boot screen. I tried to use the repair mode, but it failed. I also tried the safe mode. It still does't boot and freeze when loading CLASSPNP.SYS.
Please, do you have an idea about how to solve this problem?