Malware that AVG free cant remove

Hello Rhydian,
We are sorry to know that. Could you please send the screenshot of the threat detected so that we can assist further? Please click on the following link http://avgread.me/1aZxsAV to send the screen shot.
Thank you.

bought new laptop as pc at end of life. Attached ext harddrive that backed up from pc and scanned. Nearly ITB data. scan detected lots of problems but failed to deal with 24 malware-trojans. How do I get rid of them? 
F:\RHYDIAN-PC\Backup Set 2011-07-04 183711\Backup Files 2011-07-04 183711\Backup files 24.zip|>C\Users\Rhydian\AppData\Roaming\OpenCandy\OpenCandy_56338D7038DD475AA9533EF0F81C74BB\p1v1_PPIRegistryReviver_w.exe|>[Embedded_I#00cef3]|>[Embedded_I#05d662]|>Registry Reviver.msi

am afraid to open the external drive. It has all my photos and music and a lot of other stuff that I ant to keep

Hello Rhydian,
We are sorry to know that. Could you please send the screenshot of the threat detected so that we can assist further? Please click on the following link http://avgread.me/1aZxsAV to send the screen shot.
Thank you.