Here it is. This advice has been posted many times though.

1. Create a temporary directory on your server.
2. Copy the entire contents of the Oracle RDBMS Server CD to the
temporary directory created in step 1.
3. Search the directory structure created in Step 1 for the existence
of the filename symcjit.dll.
4. Rename each copy of the symcjit.dll to symcjit.old.
5. go to the INSTALL folder and edit the file named oraparam.ini( oracle817\install\oraparam.ini)
6. open this file and
edit from

JRE_MEMORY_OPTIONS=-mx96m

To:

JRE_MEMORY_OPTIONS=-nojit –mx96m
7. Run the ./runInstaller and install Oracle 8.1.x and related products.