Assuming you have the correct version of the patch and since you mention 1.04 I guess you got that from the SF site.
You only need the latest patch.
The problem maybe that the registry did not properly record your path.
You have really two option.
1) Reinstall and use the default directory on C drive.
2) Edit your registry useing a program for example regedit.
You only need the latest patch.
The problem maybe that the registry did not properly record your path.
You have really two option.
1) Reinstall and use the default directory on C drive.
2) Edit your registry useing a program for example regedit.