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Dear sir, <br />
<br />
&nbsp;I am using Windows 2004 server and SP 4 , first of all i installed ISA 2004 Server Trail edition on my server, then after one week i uninstalled ISA 2004 and installed ISA 2000. <br />
<br />
&nbsp;now i want to install again ISA 2004 on this server. first i un installed ISA 2000 and i try to install ISA 2004 but it giving error of &quot;&quot;&nbsp;Setup Failed while registering Wspadmin.dll&quot; I could nt install ISA 2004. <br />
<br />
&nbsp;I tried to install lot of time but i coult nt.. Please tell me the solution.. <br />
<br />
I didnt get any events in event viewer.
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Dear sir, 

 I am using Windows 2004 server and SP 4 , first of all i installed ISA 2004 Server Trail edition on my server, then after one week i uninstalled ISA 2004 and installed ISA 2000. 

 now i want to install again ISA 2004 on this server. first i un installed ISA 2000 and i try to install ISA 2004 but it giving error of "" Setup Failed while registering Wspadmin.dll" I could nt install ISA 2004. 

 I tried to install lot of time but i coult nt.. Please tell me the solution.. 

I didnt get any events in event viewer.

ISA 2004 Installation error.

Operating systems perform basic tasks, such as recognizing input from the keyboard, sending output to the display screen, keeping track of files and directories on the disk, and controlling peripheral devices such as disk drives and printers. For large systems, the operating system makes sure that different programs and users running at the same time do not interfere with each other. The operating system is also responsible for security, ensuring that unauthorized users do not access the system. Operating systems provide a software platform on top of which other programs, called application programs, can run.