Trojans are generally not repairable as the complete file is malicious, rather than a virus infecting a small part of a windows file, that small part may be able to be removed/repaired.

The fact that avast caught this, hopefully before it became established, so you are likely to be ok. However, you would be advised to run hijackthis again.

A google searchs for both lookme-c and vt100.exe returned many hits and provides information on this. Learn to use google it is your friend.