There is one downside on the C90s: it has an operating system installed that's called Windows Vista. Yes. not even 64-bit but just plain 32-bit. Half crippled because it must be compatible with zillion of programs already around but on the other hand not quite compatible.

Furthermore, it also includes the microsoft well-known user experience paradigm. This means that after I have tried it for one day, you just were not quite happy with all the requesters about licenses to accept, warning that you really should enable something, update something or even worse: restart your system. And that's where the trouble starts: your whole installation has been contaminated by at least a dozen (that's 12) programs with either limited functionality, time-limited functionality, or functionality you did not even ask for, such as:

• A 90-day trial version of Symantic Norton whatever that slow your system down.
• A trial version of Microsoft Office that's useless after starting a number of times.

The OEM version of Vista does not even allow you to run it in virtual machine on the same machine! So for an experienced linux-user it's useless.

 And then, Windows Vista is amazingy slow: At least before it tells you the computer is started. Please include logging in into this time. The time all your icons on the lower right have been loaded takes just as long as in the Windows XP times.

To be honest I did not spent too much time on Vista, not did I do a comparison with XP. There was some strange line in the license agreement about that you were allowed to run older version of Microsoft Windows on your computer, but Microsoft will not provide you that version and your always have the right to upgrade again to Vista.  I'm not sure what this means...