System State restore failure from Colorado 8GB External, W2000

[CA1169153]

I have no problems on Backup. Now I'd like to restore my full system from a tape, including my System State. To avoid conflicts with my system files, I restore to a formatted blank external hard drive, E:\. Everything works fine, I insert the restored drive into my computer, but there are slight abnormalities! For example I can't read open adobe files automatically from within Internet Explorer. What other functions have failed to be restored? I don't know!
Has anyone out there had any problems on System State restore under W2000?
Eli Y.