Windows Server 2003 x64 trial version is free to download.

→ Downloads for Windows Server

It's a good thing that Windows Server 2003 can hide drives, but I　would insist to put that an option rather than the default setting.　(To add a hard disk drive: Right click on My Computer and select　Manage menu. The management application has Disk Management section.)

Making backup's are easier under Windows Server 2003. Directories can　be scheduled to make duplicate copies to another locations.

Security is better with Windows Server 2003. Files under "My　Documents" are protected from access of other users.

The drivers, are the key factor that might be hindering from its wider use.

Here is a tool written for the platform (Windows Server 2003 x64) to get the current user name, which might come in handy where there is no tool of that sort is around on Desktop. (Click Here to download WhoAmI.zip. Here is the Windows XP version.)

There is this Farsi Kaf letter bug to this version of Windows Server 2003. The Persian Kāf should be ARABIC LETTER KEHEH (U+06A9) instead of ARABIC LETTER KAF (U+0643) as is used in the Farsi language settings in Windows Server 2003 x64. (Windows Server 2003 評価版のペルシア語入力では、ARABIC LETTER KEHEH (U+06A9)でなく、ARABIC LETTER KAF (U+0643)が使われている。)

→ The Persian letter Kāf

Windows Server 2003 x64 の評価版は、フリーでダウンロードできるが、バグもある。ドライバが少なく、使えない周辺機器がある。