Problems with SAP instalation

I am doing research work on SAP R/3.

I got the IDES R/3 4.7x2.00 installation for Windows 2000/2003 server with MS SQL Database.

Because I need to install J2EE Add-in, I have to upgrade SAP_BASIS and SAP_ABA module from level 38 to 41.

I have done this one month ago with no problem. But I had to reinstall SAP system (with out MS SQL server and OS) once again.

Now I separately upgraded SAP_BASIS from level 38-39 and 39-40. When I tried to upgrade (I use SPAM version 00019) from level 40-41 computer (OS) went down in the middle of DDIC_ACTIVATION. I tried to run OCS Queue again (it started on DDIC_ACTIVATION), but the result was the same.

What could chouse this problem?

Pleas give me some suggestion.

Regards, Mihail