You should be able to delete them from the quarntine folder...
This will help to identify malware on your system.
Please download
Combofix from any of these locations:
Here
or
Here
Save ComboFix to the desktop and please ensure that you disable realtime security/virus programs that monitors your PC while CF is running.
1. Double click on combo.exe & follow the prompts.
2. When finished, it will produce a logfile located at C:\ComboFix.txt.
3.
Copy and Paste the contents of that log in your next reply with a new hijackthis log. Do not use Code or html unless asked for.
Note: Do not mouseclick combofix's window while it is running. That may cause your system to stall/hang.
Caution...Never run and remove files using ComboFix without being supervised by a security analyst.