Trouble after installing Grid Control

[deesto]

I have 10g installed on a fairly decent Windows XP machine. It was running okay, but I had two Oracle database instance processes running at 200mb of RAM each (of a total of 1 GB of RAM), so it was a bit bogged down, as is to be expected when running Oracle as a server on Windows.

I then installed Grid Control, which seemed to go okay, and another database as well. But once the install completed, and I gained access to the Grid Control version of the OEM for the first time, that's when things got wacky. Connecting to any OEM instance started taking anywhere from 2-10 minutes, everything was bogged down considerably, etc. I tried shutting everything down and rebooting, but now things are worse. OEM is timing out and not finding servers, listener is timing out, etc. I've tried manipulating a few things in Net Manager (I noticed that my LISTENER section didn't seem to contain any data at all, and my databases weren't listed in there either) with no result.

I've also had trouble with "host credentials" and being able to administer the databases within the OEM, even after implementing a fix I had found to add my user name to a "log on as batch job" local security policy.

Finally, I noticed that after installing Grid Control, when I run "sqlplus", I now see "Oracle91 Enterprise Edition" instead of the "Oracle10g" it used to show (and I never had anything but 10g installed on this machine!).

I am nothing near a DBA and my knowledge is limited, so I apologize for not being more consise, but I'd be glad to elaborate if you tell me what you need to know.

Thank you for your help!
John

 

[deesto]

I thought I'd add a bit more info, since my post is vague...

Main problem: after installing Grid Control and rebooting, I can no longer access my databases.

When I try to launch the OEM connected to any of the 3 databases I created (which were previsouly running), the browser just times out with "page cannot be displayed".

When I run "emctl start <ANYTHING>" I get file/path not found errors, and a file path with both forward and backward slashes (starting after the "agent" directory):
C:\oracle\product\10.1.0\agent/<...etc.>

When I try to test a connection to a service in Net Manager, I get this error:
ORA-12557: TNSrotocol adapter not loadable

I had to manually add my listener info and databases info(under Service Naming) in Net Manager, but everything appeared fine in Oracle Directory Manager (unfortunately, that doesn't help much, since this is just a general info tool).

I hope this info will look familiar to someone and they'll be able to help.

Thank you,
John