Installation of SAP Netweaver 7.0 ABAP Trial Version stops at 21 %

I downloaded latest version and tried to install. The installion process stop at reaching 21 % while preparing packages for installation of ABAP.

After I started installation it takes about 15 - 20 Minutes reaching 21 % and then there is no more progress. I was waiting more than two and a half houres but the status of the process does not change and I used the task manager to cancel the installation.

When I open the file c:\windows\system32\drivers\etc\services there a two entries:

sql6 7210/tcp

sapdbni72 7269/tcp

I tried several times and removed this entries and also the sapdb folder which had been created before I restarted installation.

My operating system is XP Home and I tried to install on drive d: where is about 45 GB free space.

Did anybody have the same or similar trouble resp. who knows how to solve?

Thanks!

Otto