I have just read through the whole of the Malware thread and you certainly did an excellent job with that laptop and the cleaning of the CPU cooling fins.
After you have completed the above which is really just a little tidying and you will know that Malware expert, agreed that system restore does not need to run on the external drive and if you have backups on that external DO NOT run defrag on the backup files.
There is really nothing else left to do.
I would repeat the warning re the C drive and I would ensure you have a complete image backup on the Freeagent.
I would run the chkdsk on a weekly basis with the chkdsk /r. which includes a check for bad sectors and attmepted reovery of data from those sectors, which is then rewritten to good sectors. It is a common misbelief that chkdsk can repair bad sectors. That is NOT the case.
If those bad sectors increase by just one - it is time to replace the drive before you risk a complete crash.
The chkdsk results are of course recorded in Event Viewer, application, winlogon. If you open winlogon entry and then click the double page symbol below the up and down arrow. you can then open wordpad or whatever and right click paste to produce the results.
You can then keep that record for comparison purposes.
Edited by Macboatmaster, 30 May 2011 - 01:15 PM.